In this Wall Street Journal article
which reviews the improving conditions of banks it mentioned that the mega banks are in the best position to prosper:
They also expect the earnings power of giant institutions to win out as Bank of America Corp., J.P. Morgan Chase and Wells Fargo take advantage of their sweeping market share, funding advantages and the ability to squeeze smaller rivals on pricing. The three dominate everything from mortgages to checking accounts to small-business loans.
It's another reason to move your money
to community banks and credit unions.