I like the idea of a general sequel wave instead of focusing on one movie, and the looks Schizm mentioned are the ones I'd go for. I've been wanting a Crait Luke and TLJ Leia for ages. For a TFA anniversary wave, they'd have to choose whether to do Poe in the X-Wing flight suit or his rebel base look, and honestly, neither is that exciting to me, given that we've gotten similar figures since. I'd rather them invest in the TROS looks, since at least they stand out. As much as I don't care for the movie, the costumes were pretty cool.
Pulling a Qimir for Ben is a great idea. I also agree that, for as heavily as they pushed BB-8, it's hard to believe we only ever got 1 release for him. Make a new mold, and then repaint it for a BB-9E