They broke up.
The original team definitely did, but I wouldn't put it past Billy to try and put together more versions of the team. Like his age, he seems to be stuck in time, using the same methods over and over again. Adding slight changes, but never able to to make any actual improvements to his plans.
He could recruit Darkstar
Possible members for the Vengers:
FortressMaximus93 they literally blasted off
What do you think?