Chatnoir's head would look like those old bunny ears tv antenna. And maybe the puffballs on the collar would be additional antenna for the clearest spirit world transmissions.
It really comes down to the writing. As long as they don't Teen Titans Go it, or throw out its dignity like Fastfoward, I will hold out some hope for it. Leo and Raph switching roles could be an interesting. What would Leo be like if he isn't burdened with being the responsible leader? How would Raph be if everyone considered him the leader despite his hot headed moments? But if they just 1:1 switch their personalities under the pretense of doing something different...ugh.
