For anyone wondering how HHN Express works for those with special F&F privileges:
Pick up at Dreamworks, as we know. You need to have the e-mail open where they sent that said you specifically can ride, I want to say they sent sometime in early August. Then you move along and someone else checks I believe the same e-mail. You move further on and someone scans your Express ticket and you get a receipt printout with a barcode that you need to keep safe and not ruin, as they can not and will not give you another one. They say try to get to the ride by 9:30pm, with it being fully closed by 10pm. This entire Dreamworks process took less than 5 minutes and barely anyone was there when we went right when Early Access opened up at 5pm, but the place was fully staffed with about 2 e-mail checkers and 4 receipt givers. We didn't want to hit the ride first, instead wanted to hit a few mazes and then come back, so we returned to the ride at 6:30pm.
When you arrive to F&F, I believe all they want is the receipt, I don't think they checked the Express ticket or the e-mail. They take the receipt, so you can only ride one time. The line was small, maybe literally 3 switchbacks after the lockers, but it still took legit 35 minutes. The ride seems very slow loading. At the time I went, around 6:30pm, absolutely nobody was going on and we were the very last people in the queue for the entire time. Why nobody came after us is beyond me, as I don't believe they closed the line -- it's possible, I just don't know though, and I saw the ride running throughout the night, but never necessarily saw anyone else going in.
Unfortunately, I did not get to ride, as I was too big and they won't push down on the lap bars even though they said I was very close. Such is life though, but my friends had a great time, so that's all that matters to me and I thought I'd bestow the info of this process to anyone else trying to go and wondering how it works. Not necessarily sure what the process will be once the ride opens on the 16th, but my assumption is it won't be open to HHN guests and the Express situation and if you bought your ticket early will stay the same.