Hi there, all you needed to host this quest was game save data on your PS4 from Street Fighter V. You could still join someone else’s quest even if you didn’t have the game save data yourself.
Unfortunately, the event has already ended, but it should start back up again during the Spring Festival Event from April 4. The quest might be available to everyone at this time regardless of if they have the save data or not. I know that it will be available to everyone at some point, but I don’t know if it’s in April or later on.
I have the save data from a rented copy of SFV, so if it’s still locked for people without save data come April, I can just host the quest for you and anyone else who still needs it.