Asriel on 11 August 2018
I don't think this is outside the realm of possibility. I think Shadow is quite likely as an echo of Sonic, and Robotnik as a new character makes some sense given the heroes vs villains emphasis we've seen so far.
That being said, wasn't there a list of rumours that included Dark Samus, Chrom, Simon Belmont and K Rool joining Smash? Didn't that list Tails, as well as Isabelle from Animal Crossing?
