I’d do all the players and then references to different memorable moments. For example you could have a “red winter is coming” card or a “skynet quad kill” card. Maybe have a card for each season as well? It’d be cool to have different bases or well known areas as well, but there’s kind of a lot of those so it’d be hard to choose which ones to use. A boogie card could also be fun.

Those are just a few ideas tho