I'm still not willing to accept that it's all the imagination of a child running wild at a theme park.
MONKEY ISLAND 2 SPOILERS Didn't the ending heavily imply that the theme park was just a trick of LeChuck? I never interpreted it as being what was actually going on.
Yes. As they walk out into the theme park, LeChuck looks at the camera and his eyes glow.
I think this is just another entry in the genre of "there was no plan, so the writers added several different plot hooks on spec".