User blog comment:Omega natsu2/Chapter 369: The Place Prayers Reach, Predictions./@comment-4489126-20140129182502/@comment-7418318-20140129191309

Exactly, though it's "just" one of many things that might go bad. Apart from the already mentioned "Jellal will die" and "the guild will be blown up", here are some more examples of bad things that might happen (some rather unlikely, but still possible) :


 * Erza might break under the torture (whatever good that will do Tartarus).
 * Natsu and/or Lisanna might get tortured, either for information or in front of Erza to hurt her through her nakama.
 * The only way to prevent the guild from blowing up is seriously hurting or even killing Elfman.
 * The bomb goes up, but someone sacrificed him- or herself to save everyone else
 * Mirajane could participate in Erza's torture.
 * Meredy or one of the OS members (excluding Zero himself of course) will be killed.
 * Minerva will demolish a platoon of rune knights, leaving no survivors (not surprising or all too emotionally engaging after the destruction of the council, but still bad in it's own way).
 * Minvera will attack Sabertooth, possibly killing some of their mages.

Hell for all we know, Acnologia or Zeref might decide to turn up in person (is that term even applicable to a Dragon? :P) and still up trouble.