User blog comment:Smash The Echidna/A curious observation of mine/@comment-32712012-20171222081009/@comment-1942179-20171223071917

Yes, some people could be on a search and resuce mission, while others attempt to push back Eggman's forces, and others still attempt to uncover the secret behind Infinite's power.

As for who plays the canon characters, that I'm not sure of.