They bought the (Canadian i think) studio who made DR2, so i think that pretty much confirms they've got them signed up for all the Dead Rising they can get money from.
I expect we'll see a DR3 in a few years time, but after that they'll probably try and mix it up as it's not really a series that I think can keep being milked past a trilogy.
Sales for DR2 are very strong too so no problem there. I think the harder question is will they do a Lost Planet 3.







