I consulted the ancient texts (looking at what was part of the last major sale) and spent hours (30 minutes) deciphering what could possibly be on the sale. I figured it out. I'll list it below of what will be on sale.
Ground:
The Tracks of Victory Pack
T58
Possibly the anime girl tanks so the T80U-E1, M1A1 HC, and the 2A4M (maybe no T80 because it was on sale during Christmas, if thats the case then it will be the T72 TURMS)
King tiger
T29 (possibly)
Somua
IS-6
Obj 120 (maybe) or
T55AM1
German CLOVIS
Type 74 Redstar
CV90105
Type 90 Fuji
Ariete Certezza
K9 Vidar
Air:
Wings of Victory Pack
CF-188A (Canadian Hornet in British Tree)
JH-7A Prototype
SU-30MK2 AMV (free lunch for those play air but it works well for CAS in ground)
SU-25K
F/A-18C Early
F-20A Tigershark
F-5C
Tornado IDS WTD 61 OR
SU-22M4 WTD 61 (this and the Tornado haven't been on sale in a while, but the tornado hasn't been on sale for a longer time, maybe they retire the tornado here?)
Mirage F1C-200
MiG-23ML
Naval:
IJN Nagato
HMS Nelson
USS Maryland
Helicopters:
Tiger HAD-E
AH-64A
Other:
Starter Packs for all nations
My Hopium:
The WW2 packs for America, Russia, Germany, and Great Britain.
Sadly it seems like if you want to get a 2a4 this sale it is unlikely because all of the 2a4 packs went on sale for Christmas.
Please tell me what you think about my research in the comments and give suggestions if you think im wrong or missing anything!