As we know, 6 races and 9 Legendary Lord have been announced to be at the start of TW:W3, with many doubts about the distribution of the Lords. Here is a possible scenario:
Kislev and Cathay start with 2 LLs (4)
Each Chaos race has one unique LL (4)
Each Chaos race has one shared LL (1)
With this distribution, the shared L. Lord would provide with the illusion that all 6 starting races would have 2 L. Lords to play with.
What do you think about this scenario?