The calibre of the backers leaves me certain that this is not a PR stunt. Does the founder of one of the world's best known companies need any additional PR? How about the director of one of the all-time top grossing movies?
Seriously, the chances of this being just a PR stunt are practically nil. If they did want to get some individual PR, there would be cheaper ways to do it - e.g. buying a popular TV network and broadcasting PageNews 24/7, while paying people to watch it.
Do you want to bet? Your 99% certainty seems to imply that you offer 1:99 offers? At those rates I am more than happy to bet 100 GBP on the other side.