Rex: Um... Dude?
Spiderman: KEEP THOSE SLIMY THINGS AWAY FROM ME! THEY ARE EVIL!
Few days after watching 'Heroes United', I realized that the idea of Ben fusing to Rex as upgrade was a very similar scenario to the Symbiote being attached to Spiderman/Peter Parker from 'Spiderman'.
-Since they both have their powers 'upgraded' by a slimy alien creatures, as much as the 'Hero's United' had more centered their ideas to gears/machinery and the alien partner(?) did not have an obsessive mind of a psychopath stalker. O_O;