Maybe start with something in the UK like that. Be good to drum up a bit more competition whilst not being too overly serious. There are plenty of regular little groups of jet flyers who'd probably be up for becoming a 'team' and would enjoying going up against each other in something that isn't too serious.

Nationals is not just jets (not a bad thing but still think an all jet event would be cool) and the Top Gun event isn't really anything more than someone thinking "that was a nice flight"