It would be nice if not all the "bosses" were Dark Jedi (there are a lot of them).
Maybe a few original bounty hunters or something... at least before he gets his saber back.
This would add a bit of variation to boss battles... as it would be nice to have the odd boss battle that wasn't totally FORCE/SABER.
If they are gonna invent new storm troopers, it would be cool if they could make some standard imperial army troopers (standard Starship troopers style grey jumpsuits and helmets?)
Speeder bike enemies would be cool.. but only if they fly like proper speederbikes, swooping down on you rather than hovering. It would be cool to time it right and jump up to slice through their steering vanes.