Kanic said:
^First things first, what you refer to as help that Natsu recieved happened during the fight with Zero, and it happened only in the anime. It was more of an emotional boost, like what his father would say to him at that momment. Igneel didn't REALLY talk to him.
Also, I'm not assuming as part of the theory that igneel raised Natsu during the past. Maybe past igneel sent him in the future and then present igneel raised him there. Aaaanyway, I'm tossing these things out as random guesses, I don't have a clear image on what is to happen nor do I care particularly if any of what I said will come true. My preferances about FT's scenario are different than this theory. It's just funny to come up with stuff every now and then.
Every time we've seen dragons I believe, they're always shown in an ancient-type world with volcanoes and fire. Who knows, maybe there is already an eclipse gate in that era 400 years ago, and possibly Grandine really is Porlyusica and is using it to keep tabs on things. Just one theory. I'm really curious if Natsu's parents were DS from that era.