Maybe just to confuse the manga readers more?
I don't really think it'll have anything to do with time travel, but I believe Ishayama could somehow make it work if it comes to it.
My problem is I can't really theorize much about SnK since I always forget most details till the new chapter get out >.<
And wow, LA! Suppose you like the Big City Life?
And are you still studying? How's darkus, by the way? xD