· At 18:30 In Ben 10 Omniverse “So long and thanks for the smoothies”, Alien X tanks a seemingly universal erasing blast, then recreates the universe and everything in at 20:00 in the same episode. However, the Anihilaarg didn’t only destroy the universe, it destroyed all of existence.
Evidence of the Anihilaarg destroying all of existence can be found on Ben 10 Omniverse episode “Universe vs Tennyson” official TV guide, which clearly states the following: “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!"
After the Anihilaarg detonated, Ben said "The universe is everything I know" and then " it is everything there is", despite the fact that Ben has been to several other multiverses, dimensions, another universe in the same multiverse, Serana and Bellicus coming from another universe etc.
(In fact, Eon is a character that appears in many episodes prior to “So long and thanks for the smoothies”. Ben knows Eon is a Ben Tennyson from an alternative multiverse, Eon also has dozens of minions that each are Bens from separate multiverses)
Notice how Bellicus and Serena don't correct Ben when he says that the "universe is everything there is", they only correct him on the tense "is" to "was". The Anihilaargh destroyed everything there was I.E all of existence and Alien X effortlessly tanked and then recreated everything in existence.