In an obvious (and probably successful) attempt at appeasing Star Wars fans, Disney has all but confirmed that Boba Fett survived the Sarlacc in Return of the Jedi. The trailer for the upcoming “Star Wars Battlefront” video game (which be released prior to The Force Awakens) shows Fett engaged in the Battle of Jakku, and in the background we see a crashing Star Destroyer, presumably the same on we see crashed in the Force Awakens trailer.
Though this is not officially confirmed by Disney, given their new policy on what is canon from here on out in the Star Wars Universe, it seems likely Boba Fett is back. And probably not all that happy with Han.