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- TV Show Ended -
There is no Next Episode of Ben 10: Omniverse planned.
Eon and Vilgax team up and bring together a team of evil-parallel Bens, (consisting of Albedo, the black haired "Bad Ben", the Australian accented warlord Mad-Ben, the deformed Benzarro and the uncaring Nega-Ben) who go after a Ben who never got his Omnitrix from that summer vacation six years ago, thus considering him a 'wild card' and decide to end him so he won't soon be a threat. Professor Paradox helps mainstream Ben 10 to find a team of good Bens (consisting of the rich, famous Ben 23, a 10-year-old "Gwen 10" and mainstream Ben's futuristic self, Ben 10,000) to fight back and save normal Ben. Things take a turn for the worst when Vilgax uses a Chrono-sapien time bomb to wipe out Ben in every other dimension from the normal Ben. Before disappearing, Mainstream Ben gives his Omnitrix to Normal Ben. Paradox brings the only Ben to survive, Normal Ben, and tells him his only hope is to back to the beginning and become Ben 10 when he should have.
Normal Ben and Professor Paradox return to the point where the Ben 10 Multiverse began: when original Ben first wore the original Omnitrix at that summer camp grounds years ago. From there the two start to go through the parallel worlds to unite the good Omnitrix wearers (Ben 10,000, Ben 23, Gwen 10 and the mainstream 16-year-old Ben) to fight Eon, Vilgax, and the evil Bens: Albedo, Bad Ben, Benzarro, Mad Ben, and Nega Ben. After the team is put together, Paradox sends the other Tennysons who had their Omnitrixies to fight (creating the events of the previous episode) and keeps Normal Ben in the Event horizon. After Vilgax "destroys" the multiverse, Normal Ben returns to fight him moments after his rescue and turns into alien Clockwork to undo the multiverse wipeout. Clockwork sends the Evil Bens back to their respective universes, then returns to original Ben his Omnitrix, and the Good Bens and Gwen take turns beating on Vilgax. After their combined win, Normal Ben's Grandpa Max reveals his Plumber status to Normal Ben and they have a talk. Original Ben wonders about the various incarnations across time and space, and returns home to his own time.
Billy Billions seeks help of Mazuma, Will Harangue, Kangaroo Kommando, and Captain Nemesis to form a team (AKA: The Vengers) to take down Ben, make him look bad in front of all of Bellwood, and claim the title as the protectors of Bellwood. As the Vengers 'rescue' people before Ben and in better fashion, while Harangue edits footage to make them look good. With Ben annoyed at no longer seeking help or getting respect for helping, he "quits" being a superhero. It turns out that while they try and keep up their "heroics", without Ben they keep trying to one up the other for the spotlight. As The Vengers fight over who gets the most fame, Ben and Rook plan to take them down as the villains continuously attack each other. After realizing they're better as a team of villains, they fight Ben and Rook on live TV where everyone sees them for who they really are. They lose and flee, with local authorities in pursuit.
With Spanner's unexpected return, Ben and Rook think Jimmy Jones is Spanner because they never appear at the same time. Meanwhile Argit holds a weapon that can create Techadons at an unlimited rate with the use of water, and Psyphon and his Bounty Hunters are after the weapon, but when Argit swallows it, they have to tell Argit to "cough it up" or he won't stop puking up armies of Techadons nonstop.
Meet the Rooters, the Black Ops wing of the Plumbers from the Null Void. They're hybrid aliens, with unique abilities and when they head to the Plumbers' Base, they're looking for Kevin for his property-absorbing powers. Ben sneaks out to get Kevin, who claims to not know the Rooters, but after a run in with them Kevin bumps heads with their leader, Proctor Servantis, he begins to recollect hidden memories. By the time they reach Plumber HQ Kevin remembers that he, Helen Wheels, Pierce Wheels, Manny Armstrong and Alan Albright used to be Rooters and Kevin was responsible for their powers, as well as the other Rooters. He also discovers that Max never had a parter named Devin Levin and the Plumbers Helpers are not Plumbers children. After a fight with the Rooters, Kevin sneaks away to Argit Enterprises to reveal to Argit their hidden past.
An old friend of Blukic and Driba's asks to get back a super powerful weapon needed to stop an old villain of Blukic and Driba and Max's, who's attacking Area 51. But with the weapon hidden back in Area 51, Ben and the team must go retrieve it before this strange old/new threat can retrieve the weapon.
Rook is under the influence of Fistrick's "bro" essence, and starts to act like a bro. He and Ben infiltrate an alien fight club to claim the Golden Fist.
Ben gets dragged into intergalactic court by the other Celestialsapiens for recreating the whole universe and all of existence previously in "So Long and Thanks for All the Smoothies!" In the end, the court rules in Ben's favor that Alien X was not controlled by Ben but by Belicius and Serena.
Kevin and Argit attempt to warn the amalgam kids about the Rooters' intentions before they can hunt after them. Kevin gathers Alan, and Gwen, Ben, and Rook gather Helen and Manny. The Amalgam kids learn they aren't plumber hybrids, and Kevin goes out into the Null Void alone to put an end to the Rooters, but when Ben and the gang bring the Amalgam Kids, it turns them against Ben, and later Proctor (head of the Rooters) ends up persuading Kevin into joining his side to take down Ben.
After the Rooters have turn Kevin and the amalgam kids against Ben, they attend to hunt after him while Ben, Gwen, Rook, Argit, and Zed try to escape the Null Void.