The idea of having an explosive success on the event day is not logical, itโs improbable.
I suggest you to just advertise it or sponsor it normally like the ways Iโve shown in other topics, because I doubt much people would attend a blocky cart game event on a fixed time.
Imo, you shouldnโt make a live event with 0 active players at it might be a fail, maybe first make ads for the game and try to get an active base of players and then run the live event