They won't survive.
Scientists say there COULD have been many 'Big Bang'-like phenomena before the one that survived. So, let many political big bangs burst out, out of which a few will survive.
However, it is essential for the new or a little older generation politicians to get away from the AL and BNP. But, unless the Clause 70(2) of the Constitution is done with, I do not expect many leaders to come out of the sphere of the two parties' circular influence.