Under the circumstances, the independence of Bangladesh came at every one's surprise including Bangabandu.The point is Bhutto was the one who betrayed with East Bengali people for himself to become the Prime Minister of Pakistan and denied Bangabandu's chances to get to power and that triggared to a civil war and forced East Bengalis to fight for independence.
No doubt, in all this Bhasani was the one who was ready for the independence of the country (he founded the Ittifaq, the Awami League,two founding institutions, directly led the language moment, said Assalamu Alikum in 1957, in 1966 led the anti Ayub Mass uprising to release Mujib, he refused to join the round table conference, and declared the independence in 1970).