YOU DON'T KNOW WHAT DOOM IS... *rubs temples*
As others have said Disney has the rights for Dr Doom in the comics from purchasing Marvel, but COULD have the rights for movies IF the acquire FOX. Theme parks, still a no.
Am I reading you right?
The big issue with BTTF is that they go to the future in 2015....2 years ago.
That makes the story a huge no no from the get go.