Just asked, Tuesday 16th August is the media date that was emailed today, although this was a mass email and this could just be a date for pre-shots of the ride and general footage.
One thing I find strange, early morning, maybe they need it to be dark to show off the lighting to relaunch the coaster. And opening it at 9/10pm isn't viable, what time does it stay dark till in the morning?
Makes sense to open it at 6am showing off the new lighting and have it open all day, as opposed to opening it at 9pm and closing it two hours later...