can somebody help clarify? (contains spoilers from Anime and manga)

Thanks, if anyone can answer any of these, otherwise throw up other questions for clarifying or new theories. I just over think everything and this is what comes out of it.

Natsu, zelef and dragon slayers:
The dragon king prophecy we have seen looks like natsu wearing a hooded cloak with igneel's scarf so is natsu the dragon king or is it aconorogia or Zelef?

Also natsu's last name is dragneel which is like dragon and kneel stuffed together which would make sense if he or his brother, zelef, were the king but wouldn't there then have been some sort of historical record or story's passed down?

During the terojima island ark zelef said something like "I guess you couldn't kill me in this life...natsu" something along those lines, it's been awhile since I have watched it, but doesn't that mean that there have been natsu's before him? Then wouldn't that point to recarrination only in fast forward or has zelef been creating natsu's and dumping them out on the street to grow up?

Natsu's clothing, to me, looks like it is a step backwards in time compared to everyone else has anyone noticed that?

Also not long after Wendy joined the guild the master said something like "we have three dragon slayers just like you said would happen poruchkia (sigh)" how bad is this going to be that poruchkia would come out and tell him something was going down when Charle's keeps every little prophecy to her self?

During battle of fairy tail Fred's runes made it so anyone over the age of 80 could not pass was gajeel and natsu not able to pass because Metallica and Igneel were inside the and they are like 2000 years old or are they really over 80?

Natsu's arm in some of the newest chapters seems to be acting up is This because of him getting stronger and losing his control over E.N.D., that he didn't know he had?

How did natsu get the scar on his abdomen? Was it from his fight with future rouge?

Lucy:
Did Lucy have star dress during the battle of Tartarus stuff or did she just get cloths from Aquarius before she "died"?

Do you guys think Layla will be part of what ever is coming or is it just a coincidence that she died the same year the dragons "disappeared"?

During Lucy and flares match at the end when raven tail cheated one of the judges noticed but didn't say anything why did he not get them disqualified for outside interference or something?

Gray:
Silver is grays dad right then shouldn't he have been missing for a little befor deliora destroyed his home town since he is deliora?

General:
In chapter 446 I believe there guild marks start to glow and the sand trap is released why did that get them out of the trap? Also in one of the first frames of the trap natsu is upside down how did he get right side up if they couldn't move?

Has any thing about the one true magic been uncovered yet from awhile back?

Do you think this may be one of the last fairy tail arks, meaning the zelefe's kingdom ark? Or will Mishima prolong the E.N.D.ing events and throw in some random arks?

Fairy tail is called that because it's an eternal journey to find a fairy to see if it has a tai but Mavis is fairy heart and is trapped inside of the crystal thing lumenia histore or what ever it's called, then isn't she a fairy? and also she don't have a tail well as far as we know.

Thanks again if you can help otherwise I will try to help you guys with any questions!