Capcom is holding their Tokyo Game Show keynote right now where they've announced Dead Rising 2: Case West. Whereas Case Zero was a prologue, Case West is an epilogue that will star the one and only Frank West. The epilogue is an Xbox 360 exclusive, which Keiji Inafune apologized to PlayStation 3 fans after making the reveal.
The third act in the Dead Rising 2 saga will see Frank and Chuck working together after the events of Dead Rising 2 and is meant to satisfy the people that have been requesting Frank West since Dead Rising 2 was revealed.
Additionally, Capcom has also announced that they've purchased Blue Castle Games, the studio that developed Dead Rising 2. The studio will be renamed to Capcom Games Studio Vancouver.