SonicMario
Smash Master
If it's the only way Sonic will recieve a 2nd rep at this point, then sure. I'll accept Shadow as long as he is indeed an echo.Anyone else down for Shadow being an echo fighter of Sonic? Especially Knuckles is apparently the Sonic AT rep now instead of Shadow.
But I'm still personally pulling for Tails, he can't be an echo simply because of his major feature of his flight ability. Shadow may also have his things that would disappoint people he's unable to perform if he's an echo, but he's been a clone of Sonic in a few games (Adventure 2 and Sonic Forces in particular) so it wouldn't be too farfetched. I would hope if there's an option for an at least semi-unique 2nd rep of Sonic. They'd get Tails.
That said I am definitely thinking Shadow is the most likely just because of the echo fighter thing. And I'm not sure they allow Sonic to get more then 2 even if one is just an echo. But if there is room for 3, then I'd be highly optimistic about Tails.
Bummer for the Knuckles fans though.