Oh, surely it will. If Robin Hood got a second (and probably a third) season, Merlin deserves at least the same. I've heard it's pretty popular so I don't see any reason it wouldn't get another season.

I want to know if they'll resolve the stuff that happens in the teaser or if they'll give us a cliffhanger ending. I'm thinking Merlin's ability to play with time might help, unless it's all a ruse constructed by Nimueh.