well.. i think there's no one going no play leon kennedy because leon kennedy according to RE:2 apocalypse he's already dead. and while reading he's partner's profile in http://residentevil.wikia.com/wiki/Jill_Valentine i've read this.
In the movie Resident Evil: Apocalypse, Jill is portrayed by Sienna Guillory. Early in the film, a newspaper article in her apartment hints at her dismissal from the S.T.A.R.S. unit and her involvement with Nemesis. It also states that Jill was suspended from S.T.A.R.S. after the death of her partner, Leon Kennedy.