Laxus won't come back for a while, and he had enough screen time already. All I can suppose is that he will develop some kind of immunity to Tempesta's particle and while he tries to run away in the ending of the arc, Laxus is going to make a badass entrance and kill him. Then you also got the obvious resemblance between Gildarts and Silver which can lead us to think Gildarts will make a come back, but even so, I feel like Silver's the perfect opponent for Gray, it would be boring seeing Gildarts fight him. I mean it's easily predictable, Gildarts will let himself get his ass kicked and figure out the secrets of his magic, he will start disassembling everything that comes out of Silver's magic and falcon punch him, so yeah, hopefully Silver will fight Gray instead.
Second possibility would be to see Fairy Law shine again somewhere near the end of the chapter, but instead of Makarov, I'd rather see Laxus use it out of rage because his comrades got defeated "or" Fairy Tail had to make sacrifices. I mean, it felt sad and good at the same time when Fairy Tail was said to be 'dead' after Acnologia's roar, it was a kind of plot twist which I loved.
Those are just predictions though, I'm pretty sure they will differ from the reality, because if I get my hopes up for nothing, I'll disappoint myself, so better prepare for the worst with Fairy Tail's victory shining once again.