The crown is now fully engulfed in chaos, opening the door for a new claimant. That's the political situation into which Aegon Targaryen, aka Young Griff, will enter. As per The Winds of Winter's ...

House of the Dragon takes place only 100 years after Aegon’s invasion ... and their pursuits of the crown are equally tragic. Daenerys and Rhaenyra Targaryen are related by both their stories ...