here is my ideas
DLC Lord: Tehenhauin Prophet of Sotek:
Pretty much a non brainer, Since he is a major part of lizardmen history and probably the most notable Skink ever. hope he get red skink Heros as well
Where he starts is the better question
Location option 1: Itza
this would be a good position as it is close to Clan Pestilens and is the first Lizardmen lengendary lord in lustria proper. May be more diffucult for Skrolk though as he has to deal with Fellheart and Tehenhauin
Location option 2: somewhere in the southlands (Tlaqua): as per the lore, it is believed that Tehenhauin followed the Skaven out of Lustria. the whole campaign and his quests items would be centered around making his way back the Lustria to challenge Clan Pestilens or whoever the Skaven LL is.
pretty much the favorite of the potential FLC lizard lords. Pretty much a Suarus the size of a Kroxigor or bigger. possibly could have mechanic where he need to go out and take down worthy lord challegers. maybe since lord Kroak is there was well, make him a temporary lord via rite to use deliverance of Itza
Location option 1: Itza
his hometown plus what was said earlier
location option 2: somewhere in the world away from most lizardmen.
many FLC lords seem to be placed away from the homelands of their faction so I think the Lizardmen FLC lord will be no different, but don't know exactly where.
A chemleon Skink that was transported into the chaos realm and managed to survive fighting a gurilla war against Chaos.
Could be cool to get unique Chemleon skink heros with this guy like Alith Anar. also I mechanic I thought of could be his army doesn't take penalties to chaos corruption.
location option 1: somewhere in the chaos wastes or Norsca Albion.
this guy would be primarily be fighting chaos forces and putting him near the Shrine of kaine for ritual currency would fit nicely. also since Albion was made a full captal settlement in mortal empires recently, it could foreshadow a lizard starting there.
an intelligent Kroxigor who in the lore took over Albion. don't think he should have no pentalites to chaos corruption but maybe more untainted generation. allow for all subraces of lizardmen to be represented.
location option 1: Albion
same case as Oxyotl
give lizardmen access to lore of life
make horned ones not rampage (they are essentially temple guards with mounts)
feel free to suggest more changes
may be making a similar breakdown for Skaven DLC lord and changes to their race (already talked about one aspect already)
Heavily influenced by watching milkandcookies and italianSpartacus