Iron 10: Omniverse Adventures (Iron Man: Armoured Adventures X Ben 10 Omniverse)

The story takes place 1 month after the events of Iron Man: Armoured Adventures & 2 years after the events of Ben 10 Omniverse as 18 Year Old Tony Stark invented a new Arc Reactor capable of suiting him up in a brand new Nano Armour with multiple capabilities. However, during a mission of fighting a group of robots called Techadons, Iron Man discovered both a highly advance version of a Polymorphic Crystal & a weapon known as The Tactigon. During his study on the said crystal & weapon the Helicarrier is attacked by Inspector No. 13 & all thanks to the crystal Iron Man's Arc Reactor had made a highly advanced change which not only gave him the same powers as Mallen but could let him suit up into every armour that ever exist in the multiverse. Not only that but The Tactigon suddenly formed itself into Iron Man's right arm as his new weapon. Now, a mysterious highly intelligent frog-like alien has told him that he needs to find a 17 Year Old Hero named Ben Tennyson living in Bellwood as the duo will team up to fight evil & for Tony to learn more of his new, highly advanced, Level 20 Arc Reactor & The Tactigon.

Ben 10 is owned by Man Of Action while Iron Man is owned by Marvel.

This is also gonna be a multi-crossover fanfic so be sure to know who will appear in the story.