What Lessons Will The Muslim Brotherhood Learn?

Nathan Brown asks:

The immediate reaction among its members will be to complain that the Brotherhood was cheated. And in a sense it was, but complaint will not substitute for reflection forever. What will be the movement’s more studied reaction? In a conversation two months ago with a Brotherhood leader Amr Darrag, I made a bold prediction that in ten years, the organization will regret having sought the Egyptian presidency in 2012. He politely disagreed. In retrospect we were both wrong: The regret will likely set in over the next several months.

And what will this reflective organization regret?

He goes on to outline three possibilities.