Certainly there would be a couple of live people in the studio bantering about the recent happenings in the game world. It would be a little bit of news, a little bit of opinion. A good mix.
Then of course there would have to be contests. Contests that the listeners wouldn’t be able to go to Google and look up the answers to. Something like ‘Name The Game Tune’ or ‘Trivial Game Trivia.’
Throw in other features like ‘Game of the Day,’ break it up with the occasional game audio track (there’s plenty of ‘real songs’ in games nowadays for that to not be an issue) and I think you could easily fill an hour or two.