User blog comment:Cloverfield monster/Should we get Dr. Doom as a Cinematic Universe villain?/@comment-4652104-20140216091335/@comment-2031194-20140217062727

Agreed. There are plenty enough other villains to use for the Avengers. The FF need their Doom :)

Also, as ProfessorKilroy said, he's owned by Fox actually, not Columbia/Sony (nor Marvel of course).