Seeing the crowd of Bihar sampark kranti a daily antyodaya should suffice at first.
There is already a Mumbai Howrah weekly following Gitanjali on both sides, only a frequency increase is needed.
In reality Jnaneshwari and Samrasta both are quite slow trains, their schedule needs to be pushed up by a notch to make them more travel friendly.
The Antyodaya Express from Howrah should...
more... be Introduced from NFR actually, my vote would be from Dibrugarh, from Naharlagun would be a plus, similarly Tata LTT antyodaya can be run from HTE to make it more populous.