[With the initial response, Billy had expected a rejection, so when Loki agreed, he pauses for thought, trying to sort out how exactly to phrase this. He doesn't want to outright say that the Loki of his world is a crazy melodramatic bastard, but... he really is a crazy melodramatic bastard. Like. Really.

Well, first things first.]

I haven't been completely honest with you, but... that's probably not surprising. I don't come from the version of New York that you attacked. Tony, Cap, Barton- they're from that world, but in my version of Earth, they've all been Avengers for longer than I've been alive. The man who fought with you earlier is from that world, and there's a few others, too. [He purses his lips, then adds,] We've got a Loki, too.