The Secret of Monkey Island is my favorite game of all time and their games in totality were a formative experience when I was growing up - I'm really sad to see them go. Booo.
On the other hand, hey, Disney owns Monkey Island. I'd love them to do something with it.
I think they already did, and it's called Pirates of the Caribbean. The MI games draw heavily from that theme (which predates them, in the form of the ride). There may not be room in the market for another variation.
On another thread, they linked to Ron Gilbert saying that Disney probably would kill it in favor of their own Pirates of the Caribbean property, though Googling for it shows that he will contact Disney and at least try :) .
I'm assuming you played the Telltale Games Monkey Island already? It was actually a refreshing return to that style of gaming. I enjoyed it personally.
On the other hand, hey, Disney owns Monkey Island. I'd love them to do something with it.