RatPac-Dune Entertainment was co-founded by the billionaire of what nationality?
James Packer James Douglas Packer (born 8 September 1967) is an Australian businessman and investor.
Petr Kellner Petr Kellner (born 20 May 1964) is a Czech businessman. He is currently estimated to have a net worth of $11.4 billion according to "Forbes" list of billionaires, making him the wealthiest person in the Czech Republic and the 102nd richest person in the world as of 10 August 2016. In March 2016, his net worth was $10.9 billion.