Conversation so far:
What is the great white owl relating to Cassandra Nova?
On Earth-TRN342, Cassandra Nova has somehow survived for four thousand years and nearly conquered the world as the Great White Owl
who nearly conquered the world as the Great White Owl?
Cassandra Nova nearly conquered the world as the Great White Owl

Question: Was Cassandra the Great white owl?
Self-contained rewrite: Was Cassandra Nova the Great white owl?