How Long Will Actor's Strike Delay Sequel?

In other words, how long will the strike last? I really don't think it will last as long as the writer's strike. I myself am thinking about a month. But who knows.
If it delays the movie by a month, would that be such a big deal? Since the G.I. Joe movie is scheduled to come out on August 9th, a month later than TF2, couldn't they just switch the dates then? Have G.I. Joe come out June 25th instead? Afterall, it stands to suffer the least from this strike since it is already filmed.
If it delays the movie by a month, would that be such a big deal? Since the G.I. Joe movie is scheduled to come out on August 9th, a month later than TF2, couldn't they just switch the dates then? Have G.I. Joe come out June 25th instead? Afterall, it stands to suffer the least from this strike since it is already filmed.