I agree with
@KasumiLover -- if they come back leave it at just 1 or 2 so we can hopefully get at least one more new DOA character to the lifespan of DOA6.
Pretty confident that Rachel and Momiji are next in line, but I'm also missing my Fu and Leon. I didn't play much with Akira or Sarah, but they felt the most complete in comparison to Pai and Jacky, and 'JC Akira' took the character to new levels in Last Round. Not to mention VF seemed to garner a lot of interest from fighters outside of our community.
It's hard for me to picture Akira with the auto-combo. Nothing against Pai or Jacky; but Jacky is a much better experience in actual VF and Pai is just incredibly weak and easy to beat in DOA5. Akira and Sarah felt nearly perfect to me and tied into DOA beautifully.
Mai did this too bringing in KoF players to at least the casual aspects of DOA; having their favorite KoF character looking better in our game than her own game. While I think that Mai actually plays better and looks sexier than her DOA5 counterpart, I think many DOA5 Mai players are disappointed with her on DOA6s system. In my opinion she should have returned later to DOA6 and Season 1 should have been catch up for some missing DOA5 characters.