Keiji Inafune isn't only the creator of Mega Man, he's also a film writer and director. Inafune oversaw production of Zombrex Dead Rising sun (yes, that's the official title, according to Capcom), which was previously a Japan-only production -- but now it's coming to the US, too.
The official plot summery, via Capcom:
"Zombrex Dead Rising Sun follows two brothers as they try to escape the zombie outbreak that has hit Japan. Exploring the darker side of human nature and filmed entirely on location in Japan, Zombrex Dead Rising Sun, both pays homage to the zombie movies of the 1960s and '70s and provides links with the videogame world of Dead Rising."
Zombrex is the fictional drug used to combat the virus within the Dead Rising world. Zombrex is able to put off the permanent spread of the disease in an individual, but there is no permanent cure. Every 12 hours, a new application of Zombrex is required to avoid total zombiefication.
Right now, it's unclear how Zombrex Dead Rising Sun will actually be distributed (Capcom's website? Xbox Live?), but it's apparently coming ahead of Dead Rising 2's release in late August.