Dead Rising 3 was released in 2013 as an Xbox One exclusive as well as a launch title. It was said to have sold very well, and a Dead Rising 4 was talked about not long after the release. Its also likely that Capcom Vancouver is ditching the engine they built in favor of a partnership with Epic Games, meaning that the studio will be working exclusively with the Unreal Engine 4 from here on out.
The rumour comes from an insider one of our GAF users by the name of Ekim who confirmed the development of Dead Rising 4 following another series of Xbox E3 leaks
Since the PS4 has somewhere around a 2:1 ratio install base over the Xbox One, its possible that the next entry might opt for a multiplatform release to not miss out on the PS4 user base. Alternatively, it could follow the likes of other games from Xbox and might go the route of a Xbox/Windows 10 exclusive title.