I would say other. As has been eluded to before, most game nowadays take so long to make, and cost so much money, that studios really want to make sure their idea sells. Therefore, they'd rather greenlight, say, Halo 4, Gears of War 3 or Sterrt Fighter... I dunno, 7,000 or something - but you get my point, something from a series that's done really well in the past - rather than back some new, possibly interesting project that might fail and cost them literally millions.