There are plenty of examples of successful games based off of the Royal Game of Ur. There are the games Sorry! and Trouble. Those have been large successes in the board game industry. These games have also been out for years. These games may have even been inspired off of the game of Ur. Think about how successful the game of Ur would be then.

But you would need to think about how it would be treated by the public that doesn't know the backstory of Ur. Would they consider Ur a ripoff of Trouble or Sorry!? It could be possible that people believe Ur as a small version of Sorry! that is just cheaper to produce. This is an example if the game of Ur is not successful because of the big companies thinking it is a variation of their games, and tried to sue whoever made the modern version of Ur.
However, a modern version could be a success. Some of the big companies may even contribute their success to their game being a remodel of it in a small article if questioned about it. The game of Ur also has all of the necessary things in it to make it a fun board game. It is competitive, and can cause someone to be frustrated by being sent back to start by example.
What do you think? Would a big retail version of the Royal Game of Ur be successful or a failure?