Board Thread:Speculation, Theories, and Rumors/@comment-4892653-20170317204901

From what was recently revealed about Sonic Forces' story, is that Sonic is has failed to stop the Eggman Empire from taking over the world. So here's my theory.

The Sonic that failed to defeat the Eggman Empire is Classic Sonic. And that Sonic Forces is set in an alternate dimension. That's why there are two Sonics present. Also, the confirmed non-playable characters were displaced along with Modern Sonic.

Just in case I was right about the alternate dimension theory, Tails (either version) might reference Back to the Future Part II. By using a chalkboard to demonstrate alternate realities, and trigger events.

Either version of Tails: Imagine that this line represents our world. Your first battle with Eggman, our battle with him and Chaos, and the present. Somewhere between former two points in time, reality skewed into this tangent, becoming this world's trigger event. A world where Eggman defeated you, succeeded in taking over the world, built an army of Death Egg Robots, and perhaps Orbot & Cubot were never created. 