CLEAN : Revenge of the nerds: 130,000 fans expected at Comic Con

The speaker, a self-proclaimed nerd from Georgia, shares their excitement about attending Comic Con, a place where nerds and geeks feel at home. They highlight the unique atmosphere of the event and express anticipation for new announcements related to the Marvel Cinematic Universe, The Walking Dead, and the DC Universe.

Why does the speaker emphasize the importance of attending at least once in a lifetime?

What does the speaker mean by 'nerds rule'?