Ooo! My second post! Hello all!
Anyway to the matter at hand. There are some things if find interesting.
I think the girl might be the first fairy tail leader. I don't remember them saying that the leader was a he.
Second did anyone find it weird that the moment they set foot on the island they said they could feel magic power. When the mages die the magic should disappear. Marakov said it's the island where the first leader "Sleeps". If the girl is the leader the dragon must have woken her up.
Thirdly, I know people are saying that the girl transported them, which may be true but everyone is forgetting Levy. She is extremely smart, almost encyclopedic knowledge, she said before the blast there are spells that don't need incantations and to pour power into freed. I think either the girl transported the whole island or it was Levy.
I say the whole island was taken because for some reason if something happens to the tree they lose their magic powers. I personally don't see why. If they had the powers before joining the guild, why are they left powerless if anything that happens to the island tree. It's kinda stupid to join a guild if that's the case. The Fairy Tail branding is a detriment instead of a help.
The black dragon is probably one of two dragons that are the bosses of the others. It is probably the one who called the other dragons back to the land in which igneel and the other two dragons are. Since the Black Dragon is supposed to be Death, they might have another dragon that means Life.
Lastly, what the hell is the point of Dragonslayers if they can't slay dragons?! Did Igneel and the other dragons only teach them to slay so they could turn on them or any dragon? They should have been able to beat the black dragon. It's cool to see who took Gildartz on and won. Speaking of which why didn't he step in and help fight? He is the only one to walk away from the beast alive besides Zeref.
Oh yeah! I forgot. hehehe. Some are commenting on the idea of killing of the main characters as being impossible because it would make the readers mad. To that I say so! Readers forget that even though they are making these books for you to buy, they are foremost the creator's story. They can do what ever they want to do. Naming the book fairy tail was good because it is not tied to a specific character and even if it did have a main character they can change it at any time. I forget the name of the manga it was but at least one of the main characters died of each book. It didn't make the book any less interesting. Remember they kept killing off Goku in Dragonball. So if they are dead, it's not the end. Either enjoy or move on. I'll still keep watching.