Maybe it's just me, but he strikes me as too dull-witted to take over anything. He wasn't able to control his own passions and he destroyed a woman who once adored him. Not king material IMHO.
Daniel 11:37 Neither shall he regard the God of his fathers, nor the desire of women, nor regard any god: for he shall magnify himself above all.
Things that make a person go, hmmmmm.