So far it seems most of he original cast is returning Bill Murray, Harold Ramis, and Dan Ackroyd. No official word on Ernie Hudson, but who would turn this role down.
Sigourney Weaver was interested enough to have lunch with Bill Murray around Christmas time to discuss the possibility of a new movie.
No word yet if Rick Moranis will come out of retirement for this.
So far it seems that Judd Apatow is still on board as a producer/consultant, so we may still Seth Rogen, Paul Ruddin this feature.
A Summer 2011 release is likely, especially since the fact the script is only months away from being handed in and if Sony/Columbia like what they see… a director, crew and shooting dates will fall into place soon after.