I've been wondering to myself if they were planning to use Cho in Marvel Rising at some point and that dovetailed into his appearance here, like RiRi did.On the other hand, Swarm's connection to Miles was a bit too weird. Similarly it probably needed a bit more build-up, and in a way I can kind of see what they were going for. But as others have mentioned it feels strange they didn't use his uncle Aaron for this role. I guess Aaron being Swarm would have also felt odd, but I think they could have used his Prowler persona, not only it would have been more accurate to the comics but a nice nod to having Hobie Brown in the role last season (similar to how they had Amadeus Cho as the Hulk without any explanation a couple of episodes ago).