Anyone who has seen Blank Points knows that 1) Eraqus is inside Terra and 2) AtW is in the RoD, not dead. And as for Eraqus coming back, not likely. In Blank Points after I believe it says "All the pieces lie where they fell" it shows the different characters that Sora is supposed to help and they are Namine, Roxas, Xion, Axel, Terra, Ven, Aqua, and AtW. Yeah, they all do think that AtW is dead after that machine, exploded I guess, but I still guess he is going to make a comeback in another game. My point of saying all that is that Eraqus was not in that part where it showed the people Sora was going to help, er save I guess, and therefore he might not comeback later in a game, its still possible and it might just be by some weird miracle. I probably strayed from the original post. And it is very likely I'm wrong and it's probably because that I am extremely tired right now.