This doesn't really have to do with anything, just thought it was really funny. I found an old post of mine... I totally called what would happen in 358/2 Days, lol.
Not positive about this but if I had to guess I would say it started after KH and took place to the beginning of KH2 and the last boss (or near last) being Riku. I don't think they would make Riku (an experienced keyblader) the 1st boss (unless it's already been confirmed he's 1st). And who knows maybe in the tutorial in the beginning you'll be trained by Axel?