TV series with Keanu Reeves would be too expensive for television series budget.
May be they can do Shadow the Hedgehog movie spin-off instead with movie budget.
Perhaps. Or recast Shadow for the TV series.
in "Sonic Drone Home", Tails and Knuckles had different voice actors and no one seemed to had mind.
But, I've noticed that in some interviews and actors response over the Sonic films, they seem to enjoy and genuinely like voicing for the characters than just seeing it as a pay check.
Jim Carrey said he would like to retire from making movies, yet not only is he invested in his role as Dr. Robotnik, but Sonic 3 was his highest grossing movie since Bruce Almighty.
So maybe Keanu Reeves, one of the nicest actors I know, would "want" to continue voicing Shadow, even for TV spin-off series, if he has fallen in love with his role as Shadow the Hedgehog.
(I mean, he and Shadow has a lot in common. They're both badasses, both firearms experts, both are
immortal.)