One premise of Tron 3 was going to be Sam and Quorra's adventures outside the grid and try to create new iso's in the real world. Now with the new Jared Leto version don't know if that is still the case. But the Tron coaster could take the original Tron 3 premise and build upon it to make it its own story. Which would have the outside portion make sense. So you have originality of a story but with an IP.