I fished around for more information on different time periods of different fronts and i came to other ideas for battles they can add to the weekly rotations. Siege of leningrad can be a weekly, and since it was in the years of 1941-1944, it can allow for the 2 premium/event squad slots to be took up by squads from moscow and stalingrad but only those two battles. Another idea would be operation bagration, and the preset squads set up as such
Soviets:
2 light and 1 heavy rifle squad from this company
And then 1 light squad from the smg company
Germany:
This battle, the soviets can get their Berlin premiums/event squads, and then Germany can choose from the premiums and event squads from the Normandy campaign.
And then the western front. Let’s say rather operation market garden or even the rhine
Allies:
Rather 1 or 2 of these British rifle teams
The US
Germany would get the same rotation as what is in bagration except have one of these in their rotation
One of the sturmgruppes specifically