Another thing I find a little odd, is it seems like usually when a figure is set to come out soon, sideshow will change the date on their website. Superman is still showing June-July instead of just June.
The dates are always just an estimate. It's down to hot toys when they'll release the figures.
Hot toys have released figures sevral months earlier than the date, and they have also released figures over a year past it.
It's just a safe assumption it'll be done closer to estimated date.