Doubt Bellemare was ever interested and he's way too mavericky (scarlet letter in the PLQ), plus endorsing Cardin in Sherbrooke nuked whatever possibility there was.
Come to think of it, there ought to be more mention out there of how Charest's personal loss may have had less to do w/Charest per se than w/the "heavy hitter" strength of Serge Cardin, particularly in the event of a PQ government. Indeed, had the PQ fallen short of Lib seat numbers and Marois forced to resign, I could see Cardin as a strong candidate for her replacement...