I found this chapter a bit slow but very sweet. It also brought a few things about Fairy Tail's disbandment into view. It put a new perspective on things with Lucy's thoughts as well.
Honestly, I'm not quite sure who will be the next guild master. I was thinking Laxus would be the most logical choice, he's strong, shows great leadership skills, he'll sacrifice himself to save others (like when he inhaled all of that poison gas in an attempt to save a town in the Tartarus arc), and he's no longer acting like a dictator like in the Battle of Fairy Tail arc. But he was most likely one of the people that Lucy couldn't find. Laxus and the Thunder God Tribe have probably been training for the last year. I guess Erza is also a possibility too, but I bet Mira would be a great guild master. She did sort of help Makarov when he was guild master back in the earlier arcs of Fairy Tail. Or maybe Gildarts will return. And I really don't think Natsu or Lucy will be guild master, at least not for now. They both still need to mature, and I can't see Natsu sitting around doing paperwork all the time. But younger Makarov does remind me of Natsu, so I guess we'll just have to wait and see.
I'm also wondering about how Makarov will react when he finds out that Fairy Tail has reunited. He was extremely angered with everyone's protests back when he disbanded Fairy Tail. I just don't know how this will conclude. I wonder if Zeref, Acnologia, and END will have anything to do with it along with Lumen Histoire. Can't wait to read the next chapter!