I'd hope they don't assassinate Palmer. How could they play that off and get away with it? I bet it's going to be something more devious, like exposing him for cooperating is Assad in some way, or something like that. I think they've shown us too many people in the background pulling strings for it to be a simple bullet in the head deal with Palmer - there's something bigger going on.
But that's not what interests me the most. It's their motive. They have to want something more than simply to intern all the Muslims to prevent more terrorist attacks.
I doubt we will see an assassination. The Fox execs have not been too keen on it in the past (surprising, coming from Fox). When Air Force One was shot down, that is about as close as we got...and they never really said if the President died or not. The Fox execs said they did not want to show the assassination of a sitting President.