Board Thread:Questions and Answers/@comment-9101137-20130629223351/@comment-3096633-20140715181436

Feedback100 wrote: Actually I did, thats why I wrote it. Its obvious because time travel is not possible in those conditions and there was not any way Ben could meet himself and nothing wrong could have happened (its also the reason Paradox needed to change/bend the rules of Physics so that Ben 10,000 could meet present Ben in Ben 10,000 Returns).

Which is no doubt why they travel into an alternate timeline future in Ben 10,000 (episode)