They should have either Jill or Claire as the protagonist of RE9, if they wanted a returning veteran character.
Before the Ethan games, Chris/Leon both had their lead moment on RE6 (with female characters like Helena, Sherry and Ada all relegated to supporting characters). In Re5, it was Chris and in RE4, it was Leon. In Re7/8, the veteran character we saw returned in the story was Chris. And now in Re9, its going to be Leon? See,how they keep circling back to these two characters in the last two decades.
Meanwhile Jill and Claire (excluding the remakes) haven't headlined a numbered game for two decades. Leon is probably my favorite RE character, but they should really give Claire and Jill the lead role again aside from the remakes.