It is the future...and it has been exactly like what we expect, like what is seen in the usual Sci-fi movies.
Ben Tennyson by this time had became a grandfather who raised his teenage grand-daughter, Erica Tennyson.
To be brief Erica, a modern genius, is the wielder of Omnitrix III, the most successful of all projects of one of Azmuth's sons, Bizmuth.
Her father has been kidnapped by the evilest versions of Ben. So she was to assemble a new team of efficient Omnitrix wielding warriors from other dimensions, not necessarily being Ben's another counterpart. He gained access to other worlds making use of tools given by Professor Paradox. He is currently missing too...
Her team was led by Grandpa Ben, and hence he usually introduced to Erica to the Omnitrix warriors, with Erica slowly being intrigued...
One of them was a vigilante,...rising from his dark past to fight and end all evil happening in his world. His name was Bruce Wayne. An alternate version the Dark Knight we all know. But things in his world are much different...
Ben would only give a short intro about who he is to Erica, but the reader wil actually dive into his origins and his world.
Welcome to the origins of The OmniBat.