The other dimension, what is it?

I wasn't around ms at the time, but did LPQ come out before pap? If pap didn't even exist at the time of LPQ, and yet pap was still mentioned in the PQ, then it means things that are only mentioned in text only can still be added to the game. Sort of like the Dark Magician. (Though we knew he was coming because he was all over maple quests. Even people who lost track of the story knew his name.) So the other dimension isn't out of the question, just like Versal isn't out of the question yet. At least, that's the feeling I get. Nexon can go anywhere with this game because they left it open. And they aren't afraid to create bad excuses for a new storyline if they need to.

Same goes for the time travel part. Maybe Nexon is even hoping we pick up on the hint of future/past ludi, or future/past of the other dimension?