User blog comment:Omega natsu2/Chapter 373: Let Live Or Let Die, Predictions./@comment-24039250-20140221184559

Based on the title To Let Live or Let Die I'm thinking one of the two possibilities: Other Predictions for the Chapter:
 * Zeref want to see if he should allow Natsu to live or die at the moment OR *See if Natsu is the one who will let Zeref live or die. In other words Zeref wants to find out if Natsu has it in him to kill Zeref.
 * Natsu might try to attack Zeref
 * Zeref froze time or whatever it is he did to talk to Natsu
 * None of the demons see Zeref
 * None of the demons except for Silver knows that Zeref is here.
 * Fairy Tail is going to have a case of the Talk no Jutsu (basically just dialogue)
 * Erza and Kyouka will still be fighting
 * Minerva might see Erza and will jump in to fight her