Zombie games are slowly getting old-fashioned.I think a game with some other characters will win,here's my list:
Ghoul
Well I don't know how did I remember them,WC3 probably.But ghouls are similar to zombies,so I think it could win.
Vampires
Well they could win,in 18th century,of course.
Werewolves
Their name is telling us that they are wolves,of course.It could be cool for seven year old kids.
Games of AG admins
That could be tower defense game,featuring characters from games.But,it could win the Best Puzzle.
AG members
We have a winner!I think.