According to a Dead Rising facebook page, they are "Getting packing for a new adventure - camera, notebook and baseball bat, what else would I need for a break in paradise? - Frank".
Could this mean that Dead Rising 3 is on the way? Or maybe it is just an expansion. Either way I'm sure we will find out at the next Spike VGAs which will be held this Saturday.
This has not been confirmed by Capcom, so treat it as just a rumor for now.