OP: First of all, stay at AKL! It's amazing there, you have a savanna-view room booked, and you will not regret one second of your stay. So what if it takes a few extra minutes to get back to the room midday? Take a rideshare and spend a couple of extra bucks.
Second of all, if your DH really wants to go, then, sure, he can go. But, if I were you, I'd make it clear to him that you and your son are going to have the type of WDW vacation that you like. After all, you two are the ones who are the Disney people and it was your vacation before he asked to accompany you. Tell your DH he's welcome to join in with you and your son whenever he wants and to do whatever he wants at any time as well.
Third: If your DH does indeed go, do NOT bend over backwards to make the trip acceptable to him. The main reason not to do this is that whatever you do, if he's not having a good time, you can't fix that for him, so there's no point in trying. I don't even believe in compromise here. It's your and your son's vacation. DH is a tagalong. And, being a tagalong, he has to either go with you and your son, doing what you two enjoy, or he can go his own way and find things that he likes. After all, he's an adult. He doesn't need you or anyone to plan his day for him. At least, I hope not!
Next, I'm disturbed--and I don't know you or your DH--that your DH was so cruel to you about your love of Disney. The "creepy" part especially upset me. I'm a Disneyphile but I understand there are plenty of people who aren't. I'm tired of trying to explain to people why I love Disney--I only try when I'm confronted on this topic--because I never press anyone to tell me why they love what they love, no matter how uninteresting, boring, or "creepy" it may seem to me. I don't have to justify any of my likes and dislikes. They're not hurting anyone else and I'm enjoying them.
For example, I despise coffee and anything coffee-, mocha-, or toffee-flavored. It just tastes horrible to me. But I don't accuse anyone else who likes/loves it of having an unacceptable preference and I expect other people to leave me alone on this topic as well. I cannot change my taste buds. Or my love of Disney. Or my enjoyment to be there. And neither should you.
Finally, I think, if humanly possible. you and your DH need to have a digging-deep discussion about his insults. Instead of steering clear of talking about this for fear of having another argument, it'd be much better for both of you if you could find a way to talk about this without anger. For that, a counselor or other mediating presence might be quite helpful.