Undertaker and Brock Lesnar went toe-to-toe for two segments, as Brock first came out to defend Paul Heyman. They brawled in the ring, and once the locker room emptied to separate the two, they brawled at ringside. After a commercial break, as both men were being escorted out, they started brawling in the backstage area as well. It definitely built Undertaker as a credible threat to go punch for punch with Lesnar, and between the desperation to get to each other, and the threats that they were yelling, it established how badly each of them wanted to get in the ring. That's a must for this feud, the desire to actually destroy each other if we're going to buy it.