A while ago Ron Gilbert laid out what it'd look like if and when he was able to make another Monkey Island game: https://grumpygamer.com/if_i_made_another_monke

A while ago Ron Gilbert laid out what it'd look like if and when he was able to make another Monkey Island game: https://grumpygamer.com/if_i_made_another_monkeyisland https://grumpygamer.com/if_i_made_another_monkeyisland. He said he'd fork off the Monkey Island canon after the 2nd game, but also "that doesn't mean I won't steal some good ideas or characters from other games. I'm not above that." So I guess Murray (and using Dominic Armato as the voice of Guybrush) are part of that.