It looks like Sly is not completely closing the door to Avi. Asked by TMZ if he was open to doing EX4, he quickly replied "Absolutely". And further added that some bumps have to be taken out of the road.
TMZ further claims that they got some other actors from the "Expendables" franchise earlier this week -- including Wesley Snipes and Dolph Lundgren, both of whom said they wouldn't do 4 without Sly.
Avi, you heard the man, take those bumps out and bring the movie back to life.