Super-Runaway-Ulti-Friends! ...Yeah, those guys.
Although runaways is a Marvel team, so I'd call them the Renegades.
Part 1- The return of the 4: Tye Manitou Longshadow, Buster Lightning Jones*, Eduardo Desperado Dorado, & Asami Qi(氣) Koizumi.
Part 2- In search of the 5th: Samurai Wind Dragon Toshio Eto, who mysteriously has gone permanently 透明人間!.
Part 3- Enter the Exor Twins. ...and now they are 7
part 4- ...vs. The mag 7 Justice League!
*If Milestone is going elsewhere with Static, make this character an homage to the name of the actor who played Vulcan.