"Did I forget to mention an AMAZING Cap script meeting? Actually I did. I work here and these movies can't come out fast enough for me."
Now just because we cannot discuss any confirmed casting for the future Captain America movie, thsat doesn't mean that we cannot discuss any very, very likely casting for another movie that Captain America will feature prominently in. The upcoming Avengers movie from Marvel will pretty much be featuring a cast of actors already established in their roles from previous Marvel features. With this in mind, we can start to look at the casting for the future Marvel Avengers movie with an eye towards which actors the future Captain America will be co-starring with. (Sure, it isn't the Cap movie but it is the next best thing, right?)
Based on the confirmed casting for future Marvel movies, here is some of what we know will be the likely casting for Avengers - unless there should be any actors that drop out of the project beforehand, or are replaced by the studio (Ala Terrence Howard being replaced in the Iron Man sequel):
Scarlett Johansson ... Natasha Romanoff / Black Widow
Chris Hemsworth ... Thor
Robert Downey Jr. ... Tony Stark / Iron Man
Samuel L. Jackson ... Nick Fury
Don Cheadle ... Col. James 'Rhodey' Rhodes / War Machine
(as a possible minor or supporting character)
Tom Hiddleston ... Loki
These are the most likely 'locks' on appearing in the project; below are a couple that are nowhere near being confirmed but were heavily hinted at last Summer by Marvel execs:
Edward Norton ... Bruce Banner (there were hints at this from interviews during the San Diego con, if I recall correctly)
Lou Ferrigno ... The Incredible Hulk (voiceover; this is probably as much a sentimental idea being thrown about as much as anything)
Well, there you go: something to mull over and think about until we get closer to hearing some concrete updates on this highly-anticipated and much talked-about Marvel movie project.