Universal describes this as a centennial collection which has been put together in honour of Frank Sinatra's 100th birthday (which actually occurs in December of this year):

Description
The defining voice of the 20th century, Frank Sinatra enjoyed a legendary recording career that spanned six decades, beginning with his earliest session in 1939 and culminating with his last in 1993, for his world-renowned, multi-platinum Duets and Duets II albums. Ultimate Sinatra presents key recordings spanning the Chairman of the Board s recordings for Columbia, Capitol and Reprise, together for the first time. Ultimate Sinatra opens with 'All Or Nothing At All,' recorded with Harry James and his Orchestra on August 31, 1939 during Sinatra's first studio session. Ultimate Sinatra's 4CD edition boasts 100 tracks celebrating 100 years (plus a never before released bonus track), including many more luminous recordings that reinforce Sinatra's well-deserved moniker, The Voice. The chronological collection dives deeper into Sinatra's musical world of iconic recordings, before closing with a previously unreleased rehearsal version of 'The Surrey With The Fringe On Top' recorded in 1979. The deluxe edition also features an 80-page booklet with a new essay by Sinatra historian and author Charles Pignone, as well as rare photos and quotes from Frank Sinatra and his children, Nancy, Tina and Frank Jr., as well as Nelson Riddle, Billy May, Quincy Jones, and others.

Tracklist
CD1:
1. All Or Nothing At All
2. I’ll Never Smile Again
3. Street of Dreams
4. You’ll Never Know
5. If You Are But A Dream
6. Saturday Night (Is The Loneliest Night Of The Week)
7. Nancy (With The Laughing Face)
8. Oh! What It Seemed To Be
9. Five Minutes More
10. Time After Time
11. Night And Day
12. The Song Is You
13. I’m A Fool To Want You
14. The Birth Of The Blues
15. Why Try To Change Me Now
16. I’ve Got The World On A String
17. Don’t Worry ‘Bout Me
18. My Funny Valentine
19. They Can’t Take That Away From Me
20. I Get A Kick Out Of You
21. Young At Heart
22. Last Night When We Were Young
23. Three Coins In The Fountain
24. Just One Of Those Things
25. All Of Me
26. Someone To Watch Over Me
27. I Get Along Without You Very Well

CD2:
1. This Love Of Mine
2. In The Wee Small Hours Of The Morning
3. Learnin’ The Blues
4. Love And Marriage
5. (Love Is) The Tender Trap
6. Love Is Here To Stay
7. You Make Me Feel So Young
8. Memories Of You
9. I’ve Got You Under My Skin
10. Too Marvelous For Words
11. (How Little It Matters) How Little We Know
12. I Couldn’t Sleep A Wink Last Night
13. I Wish I Were In Love Again
14. The Lady Is A Tramp
15. From This Moment On
16. Laura
17. Where Are You?
18. Witchcraft
19. Bewitched
20. All The Way
21. Moonlight In Vermont
22. Come Fly With Me
23. Put Your Dreams Away
24. Angel Eyes
25. Guess I’ll Hang My Tears Out To Dry

CD3:
1. Only The Lonely
2. One For My Baby (And One More For The Road)
3. Something’s Gotta Give
4. Come Dance With Me
5. Here’s That Rainy Day
6. A Cottage For Sale
7. High Hopes
8. The Nearness Of You
9. I’ve Got A Crush On You
10. Nice ‘N’ Easy
11. When The World Was Young
12. In The Still Of The Night
13. The Second Time Around
14. Without A Song
15. Loved Walked In
16. Stardust
17. Come Rain Or Come Shine
18. The Girl Next Door
19. At Long Last Love
20. The Very Thought Of You
21. Pennies From Heaven
22. Ol’ Man River
23. I Have Dreamed
24. Luck Be A Lady

CD4:
1. The Way You Look Tonight
2. My Kind Of Town
3. The Best Is Yet To Come
4. Fly Me To The Moon (In Other Words)
5. Softly, As I Leave You
6. It Was A Very Good Year
7. September Of My Years
8. Moonlight Serenade
9. Strangers In The Night
10. Summer Wind
11. That’s Life
12. I Concentrate On You
13. The Girl From Ipanema
14. Drinking Again
15. Somethin’ Stupid (With Nancy Sinatra)
16. The World We Knew (Over And Over)
17. Cycles
18. My Way
19. Wave
20. All My Tomorrows
21. Forget To Remember
22. It Had To Be You
23. All Of You
24. Theme From New York, New York
25. The Surrey With The Fringe On Top (Rehearsal) (Previously Unreleased)

Bonus Download EP Of Previously Unreleased Versions - Free Voucher Included In 4CD Set:
1. What Is This Thing Called Love? (Alternate Version)
2. Just In Time (Alternate Version)
3. Guess I’ll Hang My Tears Out To Dry (Alternate Version)
4. That’s Life (Alternate Orchestral Version)

Amazon USA
http://www.amazon.com/dp/B00U38Z18A/?tag=imwan-20

Amazon Canada
http://www.amazon.ca/dp/B00U38Z18A/?tag=imwanca-20

Amazon UK
http://www.amazon.co.uk/dp/B00U38Z18A/?tag=imwan-21

There will also be a 1CD distillation available, and Sinatra collectors might want to pick this up too because it includes the alternate "Just In Time" which in the full box is only part of the digital EP:

Description
The defining voice of the 20th century, Frank Sinatra enjoyed a legendary recording career that spanned six decades, beginning with his earliest session in 1939 and culminating with his last in 1993, for his world-renowned, multi-platinum Duets and Duets II albums. Ultimate Sinatra presents key recordings spanning the Chairman of the Board's recordings for Columbia, Capitol and Reprise, together for the first time. Ultimate Sinatra's single-disc CD brims with 25 stellar recordings representing a cross-section of Sinatra's unparalleled recording career. Led by 'All Or Nothing At All' and closed with a previously unreleased alternate version of 'Just In Time,' the collection is stacked with standouts, including 'I'll Never Smile Again' (1940), 'I've Got The World On A String' (1953), 'In The Wee Small Hours Of The Morning' (1955), 'I've Got You Under My Skin' (1956), 'Come Fly With Me' (1957), 'The Way You Look Tonight' (1964), 'Fly Me To The Moon (In Other Words)' (1964), 'Strangers In The Night' (1966), 'My Way' (1968), and 'Theme From New York, New York' (1979), among many more.

Tracklist
1. All Or Nothing At All
2. I’ll Never Smile Again
3. Saturday Night (Is The Loneliest Night Of The Week)
4. Nancy (With The Laughing Face)
5. I’ve Got The World On A String
6. Young At Heart
7. In The Wee Small Hours Of The Morning
8. Learnin’ The Blues
9. Love And Marriage
10. I’ve Got You Under My Skin
11. Witchcraft
12. All The Way
13. Come Fly With Me
14. One For My Baby (And One More For The Road)
15. The Way You Look Tonight
16. My Kind Of Town
17. Fly Me To The Moon (In Other Words)
18. It Was A Very Good Year
19. Strangers In The Night
20. Summer Wind
21. That’s Life
22. My Way
23. Theme From New York, New York
24. Put Your Dreams Away
25. Just In Time (Alternate Version) (Previously Unreleased)

Amazon USA
http://www.amazon.com/dp/B00U1Z5N7Y/?tag=imwan-20

Amazon Canada
http://www.amazon.ca/dp/B00U1Z5N7Y/?tag=imwanca-20

Amazon UK
http://www.amazon.co.uk/dp/B00U1Z5N7Y/?tag=imwan-21

I already have six Frank Sinatra boxed sets, but I'll probably get this one just to have all of his best songs in one collection.

I need this like a hole in the head. So yes I'll be getting it.

I have a Columbia box, a Capitol box, and a Reprise box. But if this shows up at Discorama...well, what's a Jimbo to do?

I have 3 single CDs of the Columbia, Capitol, and Reprise years, plus a few more things, so this will be a great way to flesh things out a bit...

If my math is correct, for the 4 CD box I see:
--1 song of the Harry James years
--2 of the Tommy Dorsey years
--12 of the solo Columbia years
--48 of the Capitol years
--37 of the Reprise years
--1 prev unrel

If there is a better all encompassing comp out there, please lemme know before I plunge...

The American pre-order price has dropped by a few dollars:

http://www.amazon.com/dp/B00U38Z18A/?tag=imwan-20

Also, there's going to be a Target exclusive 2CD edition, which will be the 1CD distillation plus a live bonus disc.

Wonder if the live tracks are unreleased. I wouldn't mind an official release of live Sinatra from 1993-1994, although I suspect I'm in the minority.