Whatever the choices are, i would like to see no repeats of the OOB pieces if possible.
Example:
since the German Panzer IV is OOB, then perhaps go with a Panzer III or V ( Tiger)
German stuka would probably be the only choice for tactical Bomber
Heinkel 111 definatly the best bomber candidate, with perhaps the ME-264 as strategic bomber ( long range)
For UK just take what is OOB and make a new alternative choice. Crazy people do actually exist who will start swapping out early, mid, and late war planes or invent ridiculous house rules that UK early war bombers are 3/1 mid war are 4/1 and late war are 5/2… its probably on the horizon so by producing new types you cater to them as well and they usually buy up these things.
If they copy the OOB pieces by type but have more detail, what you got is a piece that just looks better. The goal is to create NEW pieces and you are spending money for something unique rather than a copy of another product. Its not enough to copy what is already done. These pieces can actually fill a void for all sorts of games that can cover different periods of the war.
For example the planes alone could be used to produce an existing ‘Battle of Britain’ game or replace the counters with models for improved aesthetics.
If the tank choices are right you could make a Kursk game because Germany has Elephants and Tigers in that 43 campaign, but if you just rehashed the Panzer 4 your more limited.
People would now have all sorts of new tanks and could even go with a d12 system in these smaller ‘battle games’
By producing these types you effectively can cut out GHQ from micro-armor market and attract casual gamers who are not picky about all the various types.