Iprovidelittlepianos
Vault Senior Citizen
The canon ending, as established in the Vault Dweller’s Memoirs, is that the Vault Dweller killed every Khan except Garl’s son Darion, who must’ve been on a raid or something at the time. This leaves Darion the sole surviving Khan, which leads to him forming the New Khans sometime before the events of Fallout 2. I think the Fallout Bible later confirms that he gets killed by the Chosen One. The remaining New Khans apparently stick around and continue to harass the NCR until they are pushed out of their territory towards New Vegas. At some point they drop the “New” from their name and add “Great”.If you kill the Khans it says that nobody ever hears about them again. So I guess the canon ending is that you rescue Thandi without a fight, if they are to appear in Fallout: New Vegas.
So yeah, that ending slide got kinda retconned, unless Ron Perlman was simply referring to the fact that the “Khans” are never heard from again, but he didn’t say anything about “New Khans” or “Great Khans”…