Apparently +Benedict’s “motu” would be discarded and the TLM for all the dioceses would be stopped. The only churches where the TLM would be offered would be the new prelature, which would include the sspx, FSSP and all the other indults combined. It would probably have a new name as well.
Traditio has long said that they think +Fellay would be in charge of this new, mega-indult “order”. His “50 pieces of silver” payment for betraying Tradition. Time will tell.