User blog comment:KillRoy231/My timeline order for Sonic/@comment-5707987-20131011051121/@comment-26973802-20131011202852

A lot of people seem to, probably coz Tails isn't there. If it wasn't for Metal Sonic at the end of Sonic 4 Episode 1, I'd have said CD took place before it, but for things that aren't clearly specified by games or creators, to each his own headcanon. (even more so with Mario games, some even choose to view different Mario titles as separate universes with no clearly-defined canon)