It's not just threats; his pick for FBI director, Kash Patel, also wants to get these people, that's why Trumped picked him. Trump is lining things up to get revenge on his enemies, as he promised.
Maybe you're fooling yourself, but my eyes are clear. The Donald has a long history of getting even with people who he perceives have done him some injustice. Doesn't matter if these people are guilty or innocent, he drags them into court just to make their lives miserable and make them fork over enormous amounts in legal fees. That's way he rolls; he's a seriously unstable dude.