It was a pretty good chapter, though the Natsu v Gray fight was kind of pointless, and Erza didn't specifically say that Makarov had died so they probably don't know. Well Gray maybe, but Natsu is slow so I doubt he does.
They mentioned something about a light after the fake Makarov appeared, did Makarov somehow give the rest of his power to Erza thus making her strong enough to beat Eilene? I honestly don't know how to spell her name so I apologize for the misspelling.
She and Erza are the same person? There's no way it's future Erza nor Knightwalker. I can only guess they're mother-daughteror Erza was an experiment to make someone out of her own cells which is honestly the most likely answer. If you think about it, that explains why Erza has always been super strong beyond belief AND that explains why Erza didn't have a last name to begin with. If she had come from a family she would have had one, but she didn't. We have absolutely no knowledge of where Erza came from before the island was raided and I don't think she knows either. Definitely going to go with experiment on this one.
I was really hoping to see Natsu and Gray snap when they heard that Makarov died, if that really was their reaction then I'm disappointed.