Would you play a Marvel Contest Lottery?
It would be a small mini game within the game itself. Every week, players would be able to buy lottery tickets with a form of currency (gold, units, battle chips, glory, or loyalty) for a set price in exchange for a lottery ticket for that week. It would work just like the real lottery. If your numbers are picked, you win whatever the jackpot is. There could be sub prizes for matching a minimum amount of numbers. I used to run it on an old webpage game that I helped with many years ago before apps and it was very popular among the players.