This one is a no-brainer. Tanahashi is the Japanese Cena, or maybe Cena is the American Tanahashi. Either way, they're cut from the same cloth: inveterate babyfaces, poster boys for their promotions, and statistical favorites in any match they go into. That's why this would be fascinating to see: both of these men have their long-term rivals (Orton, Edge, Okada et al) but neither has really come up against someone who's booked the way they are. Their similarities are legion, really: They're less than a year apart in age, and their pro debuts occurred less than thirty days apart. Both men hold the record for most reigns with their promotion's top title, and even accomplished somewhat analogous promotion-specific feats (Cena's won two Royal Rumbles, while Tanahashi's a two-time G-1 Climax winner). You want to talk about a big fight aura? This would be it, right here. What Should Happen: An extensive Hulk Hogan/Ultimate Warrior "I can't believe he kicked out of my thing" sequence.
