The short answer is yes. Between the US and Europe on one side and Russia, Iran, and perhaps China on the other, things in the Middle East will continue deteriorated as these powers fight for control.
I'm not so sure on two fronts. Which side would the U.S. support? The Muslim Brotherhood is an Obama Favorite. To switch sides to support that evil "Military Dictatorship" would not be to his liking. But he can't side with Iran can he? Double, double, toil and trouble.
And will there be a real Civil War? I wonder. It would seem to me that the Military would welcome it as a way to cleanse the country of the Muslim Brotherhood. I don't really think the MB is going to walk into that trap. They are hoping that they can regain the support of the Egyptian people. I don't think they can. And I think they will pull back from a full shooting war with the Military.
What I would like to see is the banning of the MB from participation in the upcoming elections. That would be a bold step. Obama would have to give another speech condemning such action. It would put the MB on the defensive and would certainly test the willingness of the Egyptian people to abandon that movement. Will the Military take such a step? I doubt it.