After the last RE was so full of testosterone, I certainly wouldn't mind to see even more female characters in 7. I'm 100% sure that Jill will return (for obvious reasons), Jen's theory about the possible connection between RE7 and the Zero remaster has convinced me that Rebecca might be there too, Sherry is now an agent and therefore qualified for kicking some more zombie butts, Revelations 2 has introduced a new female villain who is likely to appear again, and Claire can't be too far off either if/when Alex (or what's left of her) returns. It would be a dream come true for me if all those ladies came together in one game.
Then again, it could also backfire and create an unnecessarily complicated (and still stupid) story like 6, so I'll be careful with my wishes...