I mostly wonder of another thing, if they didn't wanna go back to DBZA, they could have just picked another anime to Abridged. There's plenty of schlock or other stuff they could have made fun of, do Drifters despite Kaiser being a whiny bitch how "muh dun likey" f you don't wanna do the Buu saga then say fuck it and just do GT.You know, I would have said earlier that I doubt they'd fudge things because they're autistically devoted to the series' canon, but considering in the HFIL videos they're trying to pretend Frieza could beat up Cell, I can see them doing something like that.
I think they still have enough cash and good will that they can keep it going a little longer. Plus they have these "new" series that will help keep hope alive that they're going to go eventually do the Buu saga some day.
It's been said that Demo Reel was starting to turn around and get better, and if Doug had kept it going he probably would have been fine. It's just that the site needed the Critic asap so he did it and refused to go back to Demo Reel even though it was pointed out it could still happen as a side project.
TFS on the other hand... I think they're insecure. If they go back to DBZA, then they have to accept that they really have nothing else to offer. Which I don't believe is true, if they could get an original anime off the ground with characters that are basically Nappa/Vegeta/Trunks/Bulma/Gohan/etc. just with different designs and maybe at a school, they could probably make something interesting. But it's looking like that won't happen.