Board Thread:Speculation, Theories, and Rumors/@comment-4892653-20170317204901/@comment-679780-20170321193217

Ultra's right. The reason for the name "Forces" is because it's about the major conflict between the heroes verses the Eggman Empire which has finally been established during Sonic's absence.

Though I do disagree with the concept of just Sonic being playable, given it concentrates more on a one man army than the concept of a faction of heroes.