Yeah, I could see that happening. We might even get a rematch of Gildarts and Acno, hell August might even jump in and try to team up with Gildarts for a bit since Acno is such a threat but I doubt it would end well for them.
It makes me wonder if Gray and Lucy are just going to sit there and watch Natsu try to take on Zeref by himself. I hope Gray at least jumps in and they both take on Zeref, but I'm also kind of hoping Natsu and Gray just get curb stomped by Zeref lol.
Hopefully Gray, can set the tone and get all the MCs back on track. Natsu, Gray and Erza have been disappointing this arc. Lucy's scuffle with Brandish was good though.