http://www.mangafox.com/manga/fairy_tail/v19/c160/1.html
Dragon force is supposed to be the power of a dragon and unstoppable AKA destroys everything. This is stated by Zero and his archive magic probably gave him that info.
Zero was completely owning Natsu, but that was because Natsu wasnt using the technique right until the end. But this also means that Zero is far stronger than Jella, who couldnt handle Natsu who wasnt using DF correctly at all.
I wonder if Makarov or Hades can take on that attack from Natsu?
http://www.mangafox.com/manga/fairy_tail/v20/c161/5.html
and the next few pages show Natsu using DF corectly to completely obliterate the strongest spell that has been shown in the manga. Thats debatable of course, but it is definitely top 3.
It doesnt matter what spell is used on DF Natsu because Dragon Force has the ability to destroy everything (including any spell thrown at him) and anyone.
http://www.mangafox.com/manga/fairy_tail/v13/c101/1.html
Wendy's dragon states that Wendy and Natsu had a previous relationship that was not to fond of each other, and that maybe this time around they will have a good relationship. This would mean Natsu and Wendy were most likely reborn or something into new bodies just like Zeref. Same thing with Gazeel.
http://www.mangafox.com/manga/fairy_tail/v13/c101/1.html
Also they speak of meeting at a dragon king feast which sounds prety cool.
So if you compile all this information. Their is no doubt whatsoever that Natsu, Wendy, Zeref, Gazeel, and other DS were reborn into this world after some big incident.
I mean Gazeel and Natsu cant go through a barrier because they are over the age of 80( according tot he barrier). Zeref knows Natsu, and knows Natsu is the only mage that can destroy him. And Wendy's dragon states that Natsu and Wendy had a previous relationship and that they are going to meet again and hopefully their relationship goes better this time around.
I dont know if this info has been put together already or not before on these forums, but it does leave little doubt that The spell that is keeping Zeref in his dormant state is also keeping Natsu,Gazille, and Wendy in their dormant states.
My theory is that Natsu, Gazille, and Wendy will all get their powers unlocked when Zeref has his powers unlocked. Although it is wierd that Zeref is the only one of them that can remember the past. Maybe they did that so when he grows up he will know who he does not want to become? I expect that they will get 3xor more strength onces their powers are unsealed? It took 3 of them to kill a fake dragon, and even then they were out of magic power.
Maybe Natsu was able to draw on this power after he ate Etherion and the Flame of Rebuke? Maybe those 2 substances were able to temporally unseal Natsu's powers and allow him to use his Dragon Force? I also do not think that they will recover their previous personalities because they were sort of reborn. I think Zeref will remain the same, except his powers will be through the roof.
It does seem that if you review all of the information that Author has provided and hinted to, that Mashima is not pulling wins out of nowhere for Natsu, he has planned all along for Natsu to be the strongest mage in the manga. And According to Zeref Natsu might have already previously been the strongest mage in the world. Zeref is only referred to as the strongest evil mage in the manga, not the strongest mage. There is a big difference. I wonder who the strongest good mage was?
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EDIT: JUST FOUND THIS IMPORTANT DETAIL:
http://www.mangafox.com/manga/fairy_tail/v19/c160/3.html
Doesnt it seam weird that earlier i said their powers would triple,when their powers are unsealed, and after Natsu ate the flame of rebuke he feels like his powers have tripled. I mean it took exactly 3 dragon slayers to kill the FAKE dragon in edolas, which i would think means they have at least 1/3 their power sealed away. It was also strange that Natsu had significantly less magical power than the fake dragon slayers and had to rely on secret techniques that he was taught by igneel to defeat the fake DS.
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I think It is going to be awesome if Mashima follows my theory
... I was right about my Kuma/Revolutionary/Garp theory and it turned out to be 100% accurate........
EDIT #2*********************
http://www.mangafox.com/manga/fairy_tail/v06/c046/12.html
It seems That Ur didnt use half her power when she fought Natsu the first time and that Gerrard had some plans for him that did not include him fighting him in the tower of heaven.. Which means Gerrard knows there is something special about Natsu that also has yet to be revealed.
Also Urtear is not able to fight right now or even carry Zeref so she will be far worse than half strength when NAtsu finds her and defeats her. What will happen if or when Zeref is in the hands of fairy tail and under their protection? Will hades eventually step in and own Natsu and Take Zeref and leave the rest of the 7 kin to get arrested?
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