I hadn't heard anything about when the new season was starting, but while going to IMDB to look something up, saw that it is debuting this Sunday. A quick check of the Tivo schedule shows that they are showing the last season on Friday and Saturday for a primer of the new season.
I just can't wait to see how the airplane crash effects things.
Don't forget David Hasselhoff as Nick Fury, Agent of SHIELD! Agreed, Quezzy--With the exception of Michael Keaton, most of the memorable "superhero cinema" roles have been with relative unknowns (Christopher Reeve, Jackman, Bill Bixby, etc).