To me, chances are really GOOD that the mighty Apache will be released wednesday. Why ? Wags said previously that it might be released even if not all tutorial videos are uploaded on YT, and cold-start video have been uploaded yesterday, so, to me, these are green lights.
HOWEVER, if update there is, it will not be ONLY for the AH64 release, there will be updates for other modules, the extension fo Syria map etc etc, so if depends on these as well.