User blog comment:Omega natsu2/Chapter 397: Steel, Predictions./@comment-173.69.32.29-20140816024740/@comment-68.1.178.233-20140816095232

I know it won't be Gray, even though he'd probably be able to beat him quickly, and with little trouble I think. I just can't think who else at the moment can face off with him. Of course, if Natsu gets back up after Torafusa is defeated, then we will know who will fight Tempesta.

And It will be a while, but Gray will get another fight. That's the reason he got demon slaying magic after all. It'll be him vs. END for the main event.