The Witcher 3 isn't exactly short of stuff to do, but I nonetheless lament that one of its most ambitious questlines never made it into the final game. Not only because it would have delved much more deeply into The Catriona Plague—a disease ravaging Velen that mostly serves as a background event in the final game—but also because it would have brought back The Witcher 2's best character, the elven rebel smokeshow Iorveth.
Details about this questline emerged back in 2024, courtesy of modders and dataminers Moonknight, Ferroxius, Crygreg, and Glassfish. Not content with simply discovering the details of this quest, however, that same team has set about recreating it in a hugely ambitious mod.
