Wow. That is potentially one of the best chapters of Fairy Tail I've ever read. I mean, I've always kind of enjoyed Fairy Tail, but have always felt like it's a little bit of a guilty pleasure, as I felt like it lacked the depth of other shounen manga of its ilk. However, this one chapter moved me more than any other so far and has tied the whole concept of the story together in a very neat way. I agree with what others are saying on this thread about how the whole idea of the Manga is that love is the one magic and it will ultimately be the thing that FT/Natsu needs to use to bring this story to an end and defeat Zeref.
One thing that intrigues me - People have been theorising for a while that Serena = Yuri. This chapter could very well help reinforce that theory if in fact, Yuri found out that it was Mavis that inadvertently killed his wife and became consumed with hatred. I reckon Zeref could have told him, as we know that he can be sadistic in how he plays his games, and he may have wanted to recruit Yuri for his empire. I know it said in Zero that he died, but they could have quite easily faked his death, before anyone starts on that trail of thought and Hiro could have written that in because he's only providing the readers with the same information that is written in the FT history books so far.
Anyway, not saying it's definite or anything, but this chapter has the potential to be setting it up that way.