In a book (David Ford, Germany's Secret Weapons of World War II) there is pictures of:
1) Goliath (Explosives-filled wire-guided tank)
2) Karl-Gerät 040 Mortar (Fortress smasher) (60 cm self-propelled mortar), which were used all along the Eastern Front.
3) Jet aircraft
They could add a commander for Ostheer with Goliat and the fortress smasher, and give jet aircraft for the OKW commander.
If I have assumed correctly that Relic are planning a Sovjet tank commander for the 1945 assault on Berlin, then they could give us following things (I looked on the pictures from that offensive):
1) 280 mm mortar M1939 (Br-5)
2) IS-2 or ISU-152 call in tank
3) Infantry can take a ride on the tank during the assault
If I try to guess, the two commanders on the eastern front must be a Sovjet armored commander during the 1945 "East Prussian offensive" and Battle of Berlin. The Ostheer commander is a commander that tries defend against the advancing Sovjet armies, maybe a urban defence commander.
The US commander on the left must be some kind of defence US commander during the last German offensive in West, because he is unshaved and has an infantry uniform. That is during the Operation Nordwind, because in one of the pictures you can see a Flammpanzer 38 Hetzer that was used in that specific German assault. During the same time Luftwaffe launched the Operation Bodenplatte, which support the assumption that the OKW commander is an Luftwaffe officer.
Google a picture of "Destroyed P-47s Operation Bodenplatte". That explains the "p-47 recon runs and anti infantry strafes".
Some days ago I played a random 4vs4 game, where I and my teammate next to me dominated on our side, and it was a fair game on the other side of the map. We pushed the enemy to their base on our side. Then I mined the complete area with mines combined with democharges. We took out the first tiger ace + blob, but lost almost everything. Then I thought for a while after I built some troops, that we have won the game, but then the second tiger ace arrived from the same player and destroyed everything.
Today I played a random 4vs4 game where I saw two tiger aces arrive to the field simultaneous, after the enemy had spammed the field with medium tanks. How can you counter 2 tiger aces + 5-10 medium tanks in a random 4vs4 game?