Phalanx

When the Marvel Cinematic Universe will have finally expanded beyond the world depicted in the Guardians of the Galaxy and the Thor series, it is without a doubt that enemies such as the Phalanx will be met "“ they are basically the Borg of the Marvel comic book universe, highly adaptive, with a single collective consciousness. They'd make awesome villains for multiple Marvel movies "“ if, of course, they weren't owned by Fox.

A movie could have happened with experiments on an alien race of techno-organic beings. And, just like with the creation of Ultron, their creation would have been a simple accident. And with storylines like Annihilation Conquest waiting to be adapted, a Phalanx led by Ultron would be amazing (especially if this means bringing a truly terrific Ultron to life).

In any way, we have no doubt that, at one moment in the MCU's future, a similar race would be introduced. Don't you think so?