There's sort of a 'canon' version of Bane, introduced in the last few episodes of Clone Wars (Although the name does originate from George's story notes for TPM and is mentioned in the novel) However, he's different from the old soldier who eventually decides to wear crab armor from later books. The Clone Wars version is basically sort of a proto-Vader, with black armor and an imposing voice, and with armor also very samurai-inspired, although far more ancient looking.
The guy who voiced him? Mark Hammil
I'm guessing either Lando or Fett might show up in the upcoming Han movie (Chewbacca of course is already confirmed). Maybe we'll see Lando losing the Falcon to Han, and how the two might've had a falling out of sorts.
As for Boba Fett, that might be a tough one. "Clone Wars" sort of tackled some of his transition from the orphaned clone of AOTC to the bounty hunter we're familiar with. Question is, should Daniel Logan return/Termura Morrison return or should a new guy take over? Like I stated in the Rogue One thing, Disney is certainly not above using actors from the prequels despite the film's bad reputations.