Well we all knew one character from earth-616 was showing up in this episode of Agents of Shield (Raina), but we were treated to a second one. Scorch. The character with Pyrokinesis powers turns out to be from the comics.
Tommy Ng is a former criminal with next to no back story shares the name Scorch with Chan from the TV show. He is in 2 only issues as a character, night thrasher vol 1 issue 13 and 14. There he takes on Night Thrasher. He may not be the same human name, or the same back story, but he has the same powers and villain name. He is also a Mutant, as is Raina. So it may be a fact that Marvel DOES have rights to Mutants on the TV screen. But who knows for sure.
He may be a very minor character in the comics. Very obscure, but at the very lease we should take this as another character put on the show. A minor one that we would never have seen, and hey that's what we were asking with this show right? More characters from the comics? Well there you go, even if minor, its nice to see another comic book character on the screen.