News on EX4 is pretty much dead and the project might finally be too. At least it seems to be for Sly.
On his Instagram account Sly responded to a fan asking for EX4 that it was "a little late now", whatever that means, but one can conclude that Sly might be out of the project. Now whether EX4 will ever happen without him, is the big question mark since producers keep saying that they are still working on it!
EX4 with the old formula and Sly as the main lead seems to be more and more likely to be dead, a reboot or a spin-off with Statham might still be a possibility but I wouldn't count on it any time soon.