If you get motion sickness that easily, you should probably take bonine before you enter the park. Not necessarily because of ROTM, but because you'll also be going on Earthquake, BTTF, MIB, etc. There's motion on all of those.
When I read about a launch on ROTM, I wondered what I missed. I went on this ride probably 8 times over the course of 5 days and never once noticed a launch like on RNR. I don't like rollercoasters that aren't in the dark. If I can't see the track, that's ok with me. That's why I didn't do Hulk or DD.