Monkey Island 5
From MIwiki
Monkey Island 5 as far as we know, is not in production. There have been many rumours that it will be released sometime in the future but whether or not this is true is uncertain. There have been jokes from the original creators of Monkey Island that its going to be realeased in 2015. Another joke about a fifth Monkey Island game would have to be the infamous April Fool's Day incident on The World Of Monkey Island website.
