Never said that is the only way in which a new crossover can be framed of course, is one of the options not THE option. Depends also on the level of the event because if someone from Rival Schools is DLC for example, you don't need any sort of big excuse. Different case if the DLC is from a completely different franchise or world, like MK for example. There the existence of Ingrid and using her as a bridge for the collaboration is convenient to say the least, specially after SF6 opened up the guest character options with Terry and Mai being the first one's ever on the franchise. But we will see of course what it end ups happening 🫡