Al Sadr will come back to haunt Iraq

I read that al-Yawar has invited "rebel" Shite cleric Muqtada Al-Sadr to join Iraqi politics after the June 30th US handover.

Do you think if al-Sadr is not arrested and tried, he will come back to haunt the fledgling democracy with his terroristic tactics?

I believe he may even be lie low for a few months until the American troops leave, and then make a forceful grab for power against the Iraqi government. He has learned that he will not be punished for his terrorist activities (and murder of fellow cleric). He will not be inclined to continue to use force to gain what he wants (power.)