The Bill & Ted Face the Music prequel comic series is titled Bill & Ted Are Doomed.
From the looks of things, it will take place right after Bill & Ted’s Bogus Journey, which might be proven to take place in an alternate timeline in Bill & Ted Face the Music.
Dorkin adapted Bill & Ted’s Bogus Journey for Marvel Comics back in the 1990s, so he is very familiar with material.
Bill & Ted Face the Music is getting its own prequel comic book series.