Where Heroes Collide, Part 1

Where Heroes Collide is the pilot of Generator Rex: Ultimate Alien.

Plot
Max and Ben are talking at Ben's house.

Max: Are you sure you can go?

Ben: Grandpa, look! I'm 18 now, I can live by myself. And I'm living in Rex's universe.

Max: What?

Ben: Too late gotta go, BYE!

Ben transformed into Dimensan, a new alien, created a new portal and left.

Theme Song!

At Rex's house, him and Noah are celebrating Rex's 18th Birthday. That's until Ben arrives.

Ben: Rex Salazar, we meet again.

Rex: Ben? Ben 10?