What happened to Ian

Sure David Cross may have been largely ungrateful toward the first three films and sure Ian did redeem himself at the end of the third one. But the VERY least they could've done was mention him and/or how he had changed his life around/gotten his career back.

Also, while they at least APPEARED, the Chipettes got disappointingly little screentime this time around. They should've joined the boys and Miles on their trip – er chip!

Other than that, this was a surprisingly good movie though not quite as good as Chipwrecked... The haters are as ungrateful and unappreciative of these fun harmless chipmunks as David Cross it seems... 