First of all, the big roller coasters at IOA are made by B&M, the top roller coaster manufacturers in the world. Their coasters are very, very smooth and cannot be compared to the crap coasters that bang you around at Wonderland. I have been on the coasters at IOA many times and have never felt the sensation of blacking out nor has anyone that I know. Hulk has a launch that is much much more intense than the Italian Job launches at Wonderland. All three large coasters at IOA have many inversions and are not for the weak of heart. The drops are really not the intense parts of these coasters.
My advice is to sit in the front row and keep your eyes open. That way your brain is always aware of where your body is going and you will be less likely to get motion sick.
Although the rides look intense, give them a try. They are great rides that really cannot be compared to Wonderland's coasters at all.
Then next year, head out to Cedar point and ride Millenium Force and Dragster!!!