Don't be too sure.
Obama isn't going to turn into one of the bad ones. He's not clever enough, and he's not evil.
If he lends his ears to those on the far left who most flatter him, it is natural he will try to live up to these expectations.
A man with greater wisdom wouldn't be singing the socialist chain gang song to the masses. Such a man is precisely the man who implements some far-reaching reforms and seeks the glory. FDR comes to mind as a good example of the "crisis reformer." And before that there was Lenin who swept in on a wave of economic misery and a long war. Lenin nor FDR were that bright either, so they and Obama have that in common.
Hillary would be too smart to totally go completely socialist. Obama wouldn't and that's what increase his potential for "evil."