Let's think:
-In KK2 line 1, In Citadel of Orlan set, the 2nd largest set in this line, there were 2 of total 5 knights minifigs included. In Castle of Morcia, the largest set in this line, there were all 5 knights minifigs included.
-In KK2 line 2, In Scorpion Prison Cave set, the 2nd largest set in this line, there were 3 of total 5 knights minifigs included. In Vladek's Dark Fortress, the largest set in this line, there were all 5 knights minifigs included.
-Now, In KK2 line 3, in Tower of Ages set, the ? largest set in this line, there are 4 of total 6 knights minifigs included. So, maybe there is a bigger set, that has all 6 minifigs included?
For example, maybeBattle at the Pass set, listed on Brickset is the largest one?