Board Thread:Questions and Answers/@comment-24532897-20141024232859/@comment-1413089-20141025074017

This ignores the possibility then Ben had more then one son... or the fact there is no reason to believe Kevin still has an omnitrix

Why?

The events of the epsode Ken 10, where he got his own omnitrix happend in an alternate timeline to the main series continuity. In the current continuality Kevin wasn't trapped in the null void for 32 years. He instead got out and become friends with Ben. Time was rewritten so one might as well ignore everything that happened in Ken 10.