An evil Alien X is killing Bens and taking their Omnitrixs only a few are left, an alternate Max Tennyson, who lost his Ben and Gwen, got a team of Ben 10s and a Gwen 10 to stop this evil Ben

Reboot Gwen Tennyson: YOUR ME?!

Gwen 10: yep!

Alien Force Ben Tennyson: guys we need to focus

Ultimate Alien Force Ben Tennyson: right!

Classic Ben Tennyson: got it!

Reboot Ben Tennyson: I can't believe that Alien X guy took my Omnitrix...

Omniverse Ben Tennyson: be lucky you're still here, mate