Bardock being milked to the Nth degree has ruined what interesting aspects his character held, though considering Super is just fan pandering anyway and finds an excuse to bring back long since irrelevant characters whenever they can, I wouldn't mind Bardock's return when the franchise has already hit rock bottom in writing anyway. Would get more entertainment out of Bardock than I would out of Ribrianne or Kefla anyway.
I'm pretty sure that such an attempt would end up fucking up Bardock's legend, just like Super
fucked up everything canon. AT is no longer into it. Perhaps a talented fanfic writer (cough...
me...cough) could pull it off.
Toriyama asked if he's reviving Bardock just before he revealed he was resurrecting Freeza, knowing his track record of recycling ideas (e.g. Galu's white/silver hair) it wouldn't surprise me one bit if he made Fagdock return.