Mori

Yeah, I just wonder how they might go about it.

Seeing as a) Claire's the main protagonist, b) there's a reference to the Ashford twins in the trailer, c) they might want to get Claire, Leon, Chris, Jill and Wesker all together in the same story again, and d) a RE3 adaptation might be too similar this movie, I think a sequel based on Code Veronica makes the most sense.

Code Veronica already features Claire, Chris and Wesker, and mentions Leon, who (instead of just telling Chris where Claire went) could go with Chris to Rockport to find Claire. Jill could replace Steve, and Steve's death and experimentation by Wesker could be swapped with Jill's apparent death and experimentation/brainwashing by Wesker.

Then the third movie could be an adaptation of RE5, with the whole gang teaming up to take down Wesker once and for all.