'Fairy Tail' chapter 503 plot spoilers: Natsu to turn into a dragon?

Fans of the hit manga series "Fairy Tail" will have to wait a little longer to read the next chapter, as it will probably be released by the end of the month.
As per Wikia, chapter 503 titled "The Last Sight Seen" will be released on Sept. 28. This is not good news to those who cannot wait to see what is going to happen next in the manga since the last chapter ended with a cliffhanger. Fans want to know exactly what will happen to Natsu and the tumor that continues to grow inside him. Brandish could not be stopped when she enlarged the lump, even though Lucy tried her best to prevent her from doing so. It was only when Dimaria arrived that Natsu was saved from the excruciating pain.
Although Dimaria appeared to have killed Brandish, the latter was able to cure herself and return to the battle. She is expected to help out the guild members in rescuing Lucy and Natsu, who are being tortured by Dimaria. Last chapter, Zera was revealed to be gathering the members instead of fighting with Irene.
Meanwhile, there have been a lot of speculations regarding Natsu's tumor. As per Game N Guide, rumors claim that the lump means Natsu is close to turning into a creature like E.N.D. The villain's identity continues to mystify the fans, since they cannot tell what he is exactly.
Aside from the E.N.D. plotline, there are those who believe that Natsu is actually turning into a dragon. The "dragonification" is said to be happening because he has been overusing the Dragon Slayer Magic. It will be interesting to see if this will indeed happen in 503, since anything can happen in the manga. As per the storyline, Natsu will be experiencing more pain in the new chapter. Will Dimaria inadvertently turn him into a fire-spewing legendary creature?