So are we looking at patch 2.4 tomorrow? Frankly, we have no idea. I tend to say no, because it seems like Blizzard wants to do a little more testing, but I've been wrong before, and even though I think tomorrow is too soon, I can't think of what more testing Blizzard might need to do. For Blizzard's part, Eyonix says that patch 2.4 is coming soon (and that season 4 in the Arenas is coming relatively "not soon"). Then again, Blizzard's standard answer for when anything is coming is usually "soon," so who knows what they mean by that.
If it doesn't come tomorrow, then we're definitely looking at next Tuesday, since it seems that Blizzard is almost completely ready to go live. But if our readers are right (and my original guess is as well -- I originally said it would drop before Easter, which is this Sunday), we'll see all those PTR changes (and the Sunwell!) on the live realms tomorrow.