Tema: Aliens: Infestation.
Sega has trademarked Aliens Infestation, developed by WayForward and for multiple (N/A) consoles. This comes just after Sega and Creative Assembly (Total War) announced they are developing a Dead Space style Alien survival horror game!
Source: http://www.segabits.com/?p=13056
WayForward are famous for developing 2D games like Contra 4. A couple of years ago some leaked footage came out of a Sega/WayForward Aliens game which was pegged as the DS version of Aliens Colonial Marines.
You can see the leaked footage here: