It couldn't be ending soon, there is still too much secrets to be reveal in the manga. Including the whereabouts of the generals.
At this point, I sort of wonder what happen to Miranda Bookman and the generals. Are they fighting their battle as well (but aren't all the Noah too busy dealing with Allen??)
Well, it is a fact that Allen will face Earl one and for all, it's just a matter of when, and perhaps with who.