We have yet to be able to kick off a new build which means that we are almost certainly not opening tonight. Still hopeful for a Wednesday 5/01 preview start. Will get you an update by tomorrow morning as to whether that is still viable (possibly in the wee hours of the morning after I have had a chance to look at a build theoretically kicked off in the next few hours if that happens).
As per usual, I will post release notes when the preview opens and not before.