Conversation so far:
What was Total Nonstop Action Wrestling?
Hardy made his debut for Total Nonstop Action Wrestling (TNA) at the Genesis pay-per-view, as part of the stable Immortal.
Who was he fighting?
He was the surprise opponent for Rob Van Dam, and defeated him to prevent Van Dam from receiving a match for the TNA World Heavyweight Championship.
Was he fighting with his brother at that time?
prevent Van Dam from receiving a match for the TNA World Heavyweight Championship, held by Hardy's brother Jeff.
Did he win prize money?
CANNOTANSWER.
How many people watched it on Pay Per View?
CANNOTANSWER.

Question: Is there anything else notable about Total Nonstop Action Wrestling?
Self-contained rewrite: Is there anything else notable about Total Nonstop Action Wrestling other than it's held by Matt Hardy's brother?