A small list of suggestions
1 and 2 are needed for 3 to work
1) Crossovers - I believe other studios would be more than happy to work together for crossovers, perhaps working with Bethesda to have a Vault 111 costume, Mojang for a Creeper Mask, or even Nintendo for Mario, Luigi, Wario, and Waluigi hats.
2) Console Release - Self explanatory, Among Us on Xbox One, PlayStation 4, Nintendo Switch, Xbox Series X/S, and PlayStation 5 respectively.
3) Console Exclusive Cosmetics - Goes in with 1 and 2, players who have their Among Us account (since accounts are coming) to their Xbox Live, PSN, Nintendo, etc, will gain platform exclusive content. Only Xbox players will have a Master Chief helmet, PlayStation players get a Spider-Man mask, Nintendo players could get the before mentioned Mario, Luigi, Wario, and Waluigi hats.