Our trip is complete, so I thought I'd come back and update everyone on what we did.
We got to HS very early to get a RotR boarding group. We got the very first one!! So, plans reset again, lol. We went to sign my son up for Jedi training at rope drop, then we had an early FP for Alien Swirling Saucers, so we did that first and he loved it. That's not exactly a judgement of how he'll handle bigger rides, but he really loves Star Wars, so we went over to RotR. He was totally fine with it! So we went on Slinky next -- loved it! We didn't do any coasters bigger than that, but we did SDMT and Millennium Falcon and Flight of Passage, and he did well with all of it.
What was he afraid of? Jungle Cruise, hahaha. He claims he saw a spider in a cave, so he said that's the only ride he won't do ever again. What wouldn't he go on? Soarin', because he didn't like the jumping whale when we watched it on
YouTube. Even though he was okay with Flight of Passage... but I didn't push it. He didn't want to, so my husband and I took turns on that one.
Totally just depends on the kid and what they're into. My kid is much more afraid of animals and automated flushing toilets than Disney rides, lol.
We got to ride SDD a second time at night last night, and that was awesome. When we got off he said, "That was so amazing!" He was shouting from the top of the rollercoaster that he could see Galaxy's Edge. Great memories.