To be honest...I think it was CrimsonEchidna who suggested it, but I could see them doing a Marvel Rising-type book in 2020 that encompasses all the various teen heroes in the Marvel Universe.
At this point, short of the MCU introducing the Young Avengers and making that their premier teen hero team, Marvel's attempts at sticking with a specific teen hero group have been doomed to failure in some form or another, so maybe just collect them under one branding.
Zub specified that the Champions characters would continue into the 2020 thing but he didn't specify if it would be as one team or as the Champions.