I think so too. :( I don't want Allen to leave. >.< But knowing him, he's probably going to blame himself for this whole thing and leave so that he doesn't cause any more trouble for his comrades. Either that or Lavi smacks him on the head, calling him an idiot, saying something like, "Blablablabla...you won't stand a chance by yourself, blablablabla...everybody decided to help you, and yet you're blablablablabla..." and Lenalee cries and asks Allen not to leave, saying something about how the Black Order wouldn't be the same without him, blablabla. Yeahhh...I'm pretty sure it's going to be either of these two. Unless Allen just gets depressed over this and said scenarios happen the next time something like this happens. Hmm.
(God, is there no synonym for 'happen'? >o<)