They would never tell us what happened to Megaman and Wily.
I dunno if this is a good reason or if it's absolutely stupid, but for some reason I've got it in my head that they won't tell is because they don't want the fans to get pissed at them for killing off fave characters, if that were the case. A lot of people would hate to see Rock, Roll, Blues, and the other popular main characters to get killed in the Cataclysm (or before it). I can see a Mega Man 9 being about Zero's creation or the actual Cataclysm, and I could be sure that a number of characters would get killed. And I know it's been a long time for the original fans that a lot of them could understand, but hey, not everyone will be happy about it.
I dunno, it sounds like a stupid reason to even me, but it's stuck in my head. What do you guys think of it?