I will agree that I'm not terribly interested in seeing prequel content. HOWEVER, we already do have Clone Wars content in the game: the venerable Victory-class Star Destroyer hails from the Clone Wars.
Do we ever see the Victory-Star Destroyer in the Clone Wars cartoons? That's the thing, there's a few old ships from legends that have been around "since the clone wars" but when the opportunity comes, we never see them. Sure the Y-Wing is there but that's almost literally the only thing. Z-95s were even a variant. Where were the Dreadnoughts and Victory-Star Destroyers?
I mean don't get me wrong, you don't actually SEE them during the movies (and apparently in the cartoons? you got me, I never watched the cartoons), but canon-wise, they were active during the Clone Wars when the paint was still new and their horrible engines were less of a liability. That's all I'm saying.