User blog comment:LordLuminous/Fairy Tail Chapter 411 Theories and Predictions/@comment-31.132.65.53-20141128164524/@comment-31.61.129.155-20141128214225

That's a funny idea, but I hope it does not happen. The demons were already made weaker than they seemed at the beginning... We don't need them also stupid ^^'

As for Gray and Natsu not being there for Face, yeah, I think it does make sense (and it's actually already slightly stupid on Marde's part. But he probably didn't think they would ever come back... but then, why even bother with this curse, if he only needed to stall until Face activation?)