I hope they do. But recent regional channel launches have not been very successful. Zee Keralam and Colors Tamil are floundering because many DDF members have said that they don't have good content. But Sony Marathi has very good content. Still it ranks below Zee Yuva.
Perhaps
@Endgame and
@Bishnu15 can comment on how good Sun Bangla's shows are.
When Airtel adds this channel,
@Riddhiman and
@Optimus_Prime can perhaps give a detailed review.