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.

Question: Was he fighting with his brother at that time?
Self-contained rewrite: Was Matt Hardy fighting with his brother at that time of the fight with Rob Van Dam?