Something like this is almost certainly going to happen with the merge. Both for infantry and tanks. I think, they might have even mentioned it at some point.
I would guess it’s going to be based on the theatre (i.e. campaigns) or based on landscape (winter, desert, forest, urban),
Devs are considering soldiers getting different equipment on different maps. I hope this could apply to vehicles as well, seeing as some tanks and planes have desert/winter camos on by default.
This answer was regarding if the Morocaan squad would get different cosmetics: