We're getting some more backstory for Gray and it's been quite a while since I watched this part of the anime, so I'm excited to get the refresher in the manga. Also, I really like the friendship and camaraderie between Gray and Natsu. They're at each other's throats like 90% of the time, but at the end of the day they are friends and fellow guild members. Gray is going to have a big confrontation with his past and I can't wait to see it in manga form.