"It contains the secret to another world"
It's been a while since I played the game, but didn't the treasure chest contain an E-ticket? An E-ticket grants you access to all rides at... Disneyworld
? I think of oldschool promos for themeparks where they would have a narrator going "Enter a whole new world!"
and stuff. See where I'm getting at?
LeChuck forever", that could just mean that a themepark is a great way to have a good time and escape reality
for a few minutes.
See, it may be dumb, but it works perfect within the Monkey Island context. I'm sure that if it was true it would've been part of some silly follow-up joke in Gilbert's Monkey 3. If you think it sounds unlikely, look back at Monkey 1 and imagine the game would've ended on a cliffhanger as you "face the beast" that Meathook has feared for so long. No way in hell you would've guessed it was a parrot. It's ridiculous, which is what makes it funny. I'm sure the explaination for LR's ending is just as ridicoulus too.
So thats my take on at least what the Voodoo Lady says. God I love discussing these kind of things.