I hope that it will provide with at least 8-10 hours of gameplay (not knowing the puzzles) and 1-2 hours using a walkthrough.
Ummm, here's another question: Would you accept help from your fans while working on a Monkey Island title? I mean, it would be exciting to find an unnoficial way of collaborating with you. Maybe gather a small group of people (such as us), and ask them to fill out forms with questions like
"Who would you like to see most in the next Monkey Island game, besides the main characters? a) Stan b) Murray c) Herman"
or
"What location would you like to see once more in the next MI title? a) Melee Island b) Blood Island c) Phatt Island"
Maybe I'm just rambling here, but I think most of us would like to help a bit at creating a MI title.

Right guys?