User blog comment:Bovell/New Modern Warfare 3 teaser trailers released!/@comment-203.51.54.193-20110514234333/@comment-92.239.44.194-20110515074152

no IW4 was a huge upgrade form IW3, there was a huge physics engine upgrade, a huge graphical upgrade aswell. i expect the same to happen again so this is going to run on IW5.