I still don't know much about Jan besides what I read in fic and the few episodes of EMH I've seen. And I haven't read enough MA: Adventures to figure out how that Jan is different from Wasp in 616 (other than she's not married?). I've read some New Avengers, which has introduced me to the two Jessicas and a little of Carol--I like those three quite a bit.

But yes, movieverse Black Widow definitely needs her own movie--maybe guest-starring Hawkeye or SHIELD?