Universal is SO much fun! I think Hulk is similar to RnRC in that it's kinda rough, shakes head around. There are 7 inversions I think. For years, I kept putting off riding Hulk. THen I rode Velocicoaster....after that Hulk was nothing! VC is smooth, but it's way intense. Several rolls, the huge drop after the top hat, etc. but it's so fun! best coaster I've been on, LOVE it!
I can't do Forbidden Journey anymore. Now, I just walk through the queue and tell the ride attendant I'm not riding. The queue is beyond extraordinary.
Gringotts and Mummy both have some coaster elements, but it's more hard stops on Mummy, kinda jarring, and then for Gringotts, several get up and gos, then stopping, not hard. Mummy and MiB are my favorite rides though at Universal. Mummy so well themed and fun.
Simpsons....next to FJ, it's the most nauseating, BUT it's hilarious!! the script is just too funny not to give it a try. I rode it last trip, and actually kept eyes open for a lot of it. Despicable Me and Jimmy Fallon both made me nauseous.
I love SpiderMan, but sometimes it gets to me, and the last (and maybe final) time I rode Transformers, I didn't I'd make it off w/o puking. So however you manage motion sickness, if you're prone, be prepared to.
Hope y'all have a fabulous trip. We love Universal, I even let my Disney AP lapse for this year, but renewed Universal.