Betting odds show Sanders winning 13 of 14 Super Tuesday races
That would get almost all of the others to drop out. I'd see only 1-2 others sticking around after that.
I think the race will look much different by Wednesday. Regardless who else remains, I kinda think Bloomy can stay in it indefinitely. I do think he got in it to try to win it. But short of that he can have a lot of influence by remaining a candidate no matter how hopeless his chances are. As a candidate he can throw as much money as he wants at political ads smearing both Trump and Sanders, and being a sympathetic surrogate for whoever has the political strength to oppose Bernie.