: It was highly praised for its action and character chemistry, quickly becoming a fan favorite and reaching the Top 100 on iTunes shortly after its release. Ben 10/Generator Rex: Heroes United | Ben 10 Wiki | Fandom
: They eventually team up against Alpha , a sentient, parasitic nanite created by Rex’s brother, Caesar. Alpha was previously banished to the Null Void (a familiar prison to Ben 10 fans) and has returned to absorb Rex's Omega Nanite to achieve "perfection". The Climax: Heroes United ben 10 generator rex heroes united movie