So it looks like there wasn't much to the rumour that The Fantastic Four would be returning to Marvel and entering the Marvel Cinematic Universe - but the possibility certainly got us very excited.And not because of the Four themselves, nobody really even cares about them right now. No, the reason we got excited was the prospect of their nemesis Victor von Doom, aka Dr Doom, finally getting the big screen treatment he deserves.Doom is one of the greatest villains in the history of comic books, and should be one of the all-time great movie villains too, but the two big screen portrayals of him to date have fallen flat.The rumour which circulated this week but has since been denied by both parties, claimed that Marvel Studios offered 20th Century Fox a trade. In return for the big screen rights to The Fantastic Four, Marvel would allow Fox to make television shows which spin off from the 'X-Men' movies - the rights for which reside with Fox.It's a deal that makes perfect sense for all involved, and may yet prove true. Both sides would deny such a deal until it had been finalised - so we're not losing hope just yet.Some might look to the critical and commercial failures of the previous three 'Fantastic Four' movies and wonder why Marvel would want the rights back - but the answer is absolutely, 100%, Doom. Okay, maybe its actually 90% Doom and 10% Galactus.As the MCU grows it will begin to run out of new characters to introduce, and in particular villains. They had plenty to pick from as it was, but few with the kind of stature of Loki or Thanos.The return of Spider-Man to Marvel, via a deal with Sony Pictures, gives the company its famous web-head, but also the likes of Norman Osborne, Doctor Octopus, Venom, Kraven The Hunter and so many more.