In Disney's defense, Universal hasn't exactly copyrighted a map.
While the resemblance is definitely noticeable, one is the Marauder's Map and the other is a generic pirate/adventure/treasure map. I highly doubt the marketing department went, "Hmm. What should we put onto this new website? A map? No. That wouldn't work. Unless . . . What if we copied WWoHP's map?! Now we're talking!"