That was just a hypothesis. The one I think is most probable is Rogue following Natsu.
Oh,is that so? Destroyed destiny? You sure? If that's the case,then why are the events that lead to Rogue's corruption still going without a hitch? Natsu probably only delayed it by taking Rogue's job.
In this chapter,it's indirectly confirmed that Natsu and cia fought Tartarus in future rogue's timeline. Considering that Future Rogue used magic,it was rather obvious Tartarus was doomed to fail from the start (well,if we remember this is shounen,that would obviously happen).