They should remake RE3 with a big city and you can choose your way out of there (like in Outbreak) depending on what parts of the city you visit, the game progression changes. Of course, the remake should include Brad, Carlos, Nicholai, Mikhail and Nemesis. The city should be a mix between RE2, RE3, Outbreak and some new areas. They should foccuse on Jill's motives to stay in Raccoon city the UBCS, what happened to STARS after the mansion incident, etc.
It'd be fun if they mix some events of RE3 and RE2. I mean, Nemesis attacking Leon/Claire, Birkin attacking Jill/Carlos, Jill finding Marvin, Jill finds Ada, etc.
Also, Jill and Carlos should be more together, and only separate when they have to (because of Nemesis, or for Jill to goes through a tight passage, etc), because, if i was stuck in the city and i found another survivor, i'd stick with him/her.