@santiagolmtz I did some searching and it looks like at least one of Miles Mathis's guest writers thinks James Corbett is controlled opposition, but I don't think he/she provides significant enough evidence, just pointing out last name connections which could mean anything (IMDB, a source that Mathis typically cites, doesn't show anything), and it's from one of his guest writers, not Mathis himself.
http://mileswmathis.com/gbn.pdf (page 7)
I do see Mathis's articles linked in the comments on The Corbett Report. James doesn't seem to delete them, and James openly claims that you shouldn't put full faith into him. I don't think a controlled-op would say that. That doesn't mean that everything he says is right though.
Both the mainstream and most of the alternative news outlets refuse to acknowledge the existence of Miles Mathis, even though clearly some of their articles or videos were made as a response, like the ones responding to the Stephen Hawking report. They just don't mention his name. News outlets will write hit pieces on Alex Jones, Tucker Carlson, Joe Rogan, Keith Woods, and Red Ice TV all day and mention their names, but they pretend that Mathis doesn't even exist.
I mean even the alternative press won't respond to Mathis's hit pieces on them. You'd think Red Ice who always responds to hit pieces on them would respond to Mathis claiming that they are CIA fronts, but they don't. All of this tells me that he is probably on to at least something that both the mainstream and controlled alternative media doesn't want to admit.