A new King of Game rises: King of Monster Island

We have detected irregular movement on the Monster Island. The volcano is erupting like never before. Monsters from all around the world are gathering on the Island, what is happening? They don’t even fight each other anymore!
Because is a greater menace is lurking. Something big enough to threaten every monster and make them fight together against the same enemy…

Was this in the script? Wait… Is this a cooperative King of game?