OP - I would have to think that it would have to be something that Matt thinks has the potential to ruin his life. So yeah, probably something to do with Daredevil. Or yeah, he could probably also get the sudden partially-correct information that they're trying to mould him into a tool to be used (by that I mean, old information, because they actually just want him for HIM now because, oh gosh, he's an actual human being that they actually like now in some weird way).

(I had thoughts of maybe one of them wanting to make a sex tape and Matt noticing, but somehow I don't think they'd do that in this verse?)