It's felt pretty natural though. Nightwing is obviously intertwined in the story. Jason happened to be in Gotham and here the call. Plus, it led to a flashback with Tim that shows that both characters have the capacity not to be dark brooding d-bags.  I like it. now, I can't say that it makes a whole lot of sense for JLA to be involved, or the Birds of Prey. In fact, that scene in JLA was damn confusing. I appreciate that JLA is taking place in real time DCU now, but it's awkward that for the entirety of the JLA's existence, that no other heroes (besides MM) have even crossed their path. That said, I hope MM shows up more. That said, I'm done typing.