Board Thread:General Discussion/@comment-5501448-20160509010655/@comment-24152851-20160511060812

Well there's also the Ben 10,000 universe which was already established in OS. They probably thought people would like to see multiple alternate Bens fighting each other in a battle. It was kind of cool that episode.

Having watched so much Doctor Who, this is pretty mild when it comes to messing with time travel. Can get much more complex.