Did you guys know that Marvel owns the rights to Men in Black? Um, they bought the rights back in 1994, so they are technically part of the MCU. So, they could very easily, uh, do some crossover business, especially with this multiverse shenanigans they've been up to, so... I'm kind of glad they haven't, though, because I've seen enough of that shit to last me a lifetime, so... Yeah. Good deal.

I gotta say, in the final part of Endgame, the men in black just showed up and just straight up obliterated bloody Thanos or some rubbish.