So here's my blue sky idea for why Resident Evil hasn't been announced yet.
Apparently Mike Aiello is heading to Universal Studios Japan, home of a year round Resident Evil attraction. If he's doing scouting work, seems to me like it's a bit late in the game which could mean the house is kind of thrown together last minute. For a fairly major IP I doubt that's the case.
Maybe they are investigating the possibility of borrowing their technology where the guests use a gun linked to a wristband.
I'm sure it'd be an upcharge... it's just something I thought of as a potential reason why it's yet to of been announced + Aiello's Japan trip.