Honestly, I'm a little surprised Disney even allowed that lol, given how strict they can be. I think the lines about it being simply a ship painted black by Stan were added as a middle-ground, but still was an awesome sight in the opening moments. Sea of Thieves made a crazy "what if scenario" of POTC and Monkey Island existing in the same universe actually possible and yes, to your point, that is pretty mind blowing. Perhaps Guybrush and Jack interacting isn't too far-fetched. Not anytime soon, but who knows, maybe at some point in the future.
What a year it's been for Monkey Island.