okay the first thing to understand is that most of alien force has been thrown out of the window to this point the second series has been almost complete fail so i will be taking what is good about the show and mixing it in here
For starters this takes place 7 years after the first series instead of 5, and that Ben never removed the omnitrix.
During the 7 year interval Ben has made a name for himself as a hero taking down some alien threats but mostly sticking to human criminals. His omnitrix has improved as well. In addition to the 19 aliens he had access to at the end of the first series he has access to his alien force aliens (including a highly altered alien x) During this same period Gwen's magical powers have grown a great deal making her known to the various magic users and groups.
As for Kevin 2 years prior to the idea he escaped from the Null void (which it is later discovered is another section of the phantom zone) and thanks to him finally learning how to revert to his human form lays low His powers are altered slightly after an incident with the Parasite causes his powers to mutate into the ability to copy any ability his victim has slightly altering his battle form. he is still the sociopath he was before but he is smarter about it.
After it founding the Justice league becomes aware of Ben 10 and Lucky Girl and their actions. for the most part reactions are mixed Superman and Green Lantern worry about kids being involved with super heroics so young While Jonn is fairly indifferent Hawkgirl acts indifferent but makes a note in her reports to the Thanagarian homeworld about the threat Ben and Gwen might be to their efforts.
Eventually the Thanagarian invasion happens Ben and Gwen manage to keep bellwood safe for a while but eventually have to go underground.
Fast forward to the formation of the JLU along with 3 others (Static, Gear and Supergirl) Ben and Gwen are invited to join the league on a probationary basis (meaning that any missions they take are to involve a senior member)
and thats about it the majority of the story would be about the missions they do as members of the league. i imagined that there would be a story arc involving a large number of meta humans being attack by somebody that keeps talking about somebody named Ben. though that is really up to whom ever writes this
For starters this takes place 7 years after the first series instead of 5, and that Ben never removed the omnitrix.
During the 7 year interval Ben has made a name for himself as a hero taking down some alien threats but mostly sticking to human criminals. His omnitrix has improved as well. In addition to the 19 aliens he had access to at the end of the first series he has access to his alien force aliens (including a highly altered alien x) During this same period Gwen's magical powers have grown a great deal making her known to the various magic users and groups.
As for Kevin 2 years prior to the idea he escaped from the Null void (which it is later discovered is another section of the phantom zone) and thanks to him finally learning how to revert to his human form lays low His powers are altered slightly after an incident with the Parasite causes his powers to mutate into the ability to copy any ability his victim has slightly altering his battle form. he is still the sociopath he was before but he is smarter about it.
After it founding the Justice league becomes aware of Ben 10 and Lucky Girl and their actions. for the most part reactions are mixed Superman and Green Lantern worry about kids being involved with super heroics so young While Jonn is fairly indifferent Hawkgirl acts indifferent but makes a note in her reports to the Thanagarian homeworld about the threat Ben and Gwen might be to their efforts.
Eventually the Thanagarian invasion happens Ben and Gwen manage to keep bellwood safe for a while but eventually have to go underground.
Fast forward to the formation of the JLU along with 3 others (Static, Gear and Supergirl) Ben and Gwen are invited to join the league on a probationary basis (meaning that any missions they take are to involve a senior member)
and thats about it the majority of the story would be about the missions they do as members of the league. i imagined that there would be a story arc involving a large number of meta humans being attack by somebody that keeps talking about somebody named Ben. though that is really up to whom ever writes this