John Cena popped the question to Nikki Bella on one knee. The Undertaker put one foot in the grave.

And if you don’t know the significance of these two events, you are not one of the millions of fans who watched Sunday night as the 33rd annual WrestleMania event unfolded.

About 75,000 attended the live show in Orlando’s Camping World Stadium. The “Showcase of the Immortals” — as World Wrestling Entertainment Inc. likes to market the card — fulfilled its usual role of celebrating and capstoning a year of storytelling for the insular and bombastic world of wrestling entertainment.

And make no mistake, that world is a big one: The WWE is a $1.65 billion dollar company that has 750 million social media followers across multiple platforms and reports at least 3 million weekly television viewers.

The major news of the evening for those who keep track of wrestling story lines had little to do with the main events in the ring. All five championship belts changed hands. But a proposal and a retirement were the most significant developments.