Board Thread:Speculation, Theories, and Rumors./@comment-15024974-20140711031830/@comment-15024974-20140715021940

PAX wrote: SnufflesTheDog wrote: GUYS!! We all know that Sonic Generations is likely a paradox, eg: Classic Sonic met with Modern Sonic. that would be impossible even with time travel. actually Sonic Generations makes sense now, the good future for Stardust Speedway is the canon version, and we see the bad version, the Time Eater rips through SPACE and time, leading to other timelines, they can be with each other, until the ending, in which Classic Sonic and Tails must  go home.

That also explains how Crisis City is in the game.