In the last Couple Chapters and in this one Natsu seems really matured, i like that.
After seeing that Cover, i totally see some Sabertooth oder FT Members joining the fight against Avatar. I don't think Natsu will take them all on, even with his recent power up.
I really see Erza showing up in the climax of the fight between Natsu and Gray and hitting their Heads together, so that they calm down.
Looking forward to the next Chapters :)