User blog comment:FairyRaven/Fairy Tail Chapter 328: Zodiac, Review and Commentary/@comment-4933386-20130419125951

I was wondering if each Dragon Slayer is going to fight each dragon... I'm actually trying to think why did Rogue turned evil... my guess is that it's because he couldn't defeat one of the dragons and perhaps the dragon will be like "you are not even strong enough to defeat me." then rogue wants to become stronger and kills Sting and absorb his power.

Theen maybe Natsu will kill the current Rogue (THAT MEANS FUTURE ROGUE DIES... does it??) speaking of that... shouldn't they just do that now? just ask one of the people that is with the gate to communicate with Warren and say Rogue will turn evil and then everyone kills him. Problem solved.