During all of these WB cartoons, they always have cameos of other WB cartoons in them such as props and characters from other WB cartoons ake short appereances.
In LU I spotted a few WB cameos in the episodes.
In "The Hunter" there were some famous paintings re-modeled with Sylvester, Granny, and Tweety's heads and faces, and Pepe and Penelope were one of Otto's "frozen-live" trophies (must be marked on as "The greatest lovers of all-time").
In "I am Slammicus", in the frozen tundra part, there was a piece of a statue or something that looks just like Batman's helmet/mask
And the cow that almost dropped on Duck in "Cape Duck" was said to be the floating cow from "Earthworm Jim", a WB cartoon imspired by some cheesey-looking video game.
I too have noticed the cameo appearances in the Hunter episode, but not the "I am Slamacus" one. Still, it's interesting how they wanted to include some of the ancestors in the second season of LU.