First, as far as his work on Captain America and Thor is concerned, here is what Sam Jackson had to say:
"In the next month or so, I have to do one day on 'Thor,' and I gotta do another day on 'Captain America,' and in April we start 'The Avengers' — the big deal with everybody. 'Thor' and 'Captain America' are pretty much done, but I haven't done my part in them yet. I'm just connective tissue for them to join 'The Avengers.'"
Then elaborating ever so slightly on The Avengers, Jackson also revealed that he'll have a female sidekick in the superhero ensemble flick. He states: "I gotta screen test like five actresses on Friday. They have this new character that's my sidekick or something, that's with me all the time." So apparently Black Widow won't be accompanying Nick Fury as she did in Iron Man 2. Director Joss Whedon has said there would be other female characters besides Scarlett Johansson's leather-clad Black Widow, but the question is - who from the Marvel universe will be at Nick Fury's side? Who do you think Fury's sidekick might be?