I propose a Kane and Lesnar feud. Have it start tonight with an enraged Lesnar coming out in his ring gear, going crazy at the top of the show, calls out Seth Rollins and demands a title match right now. Kane then comes down, promos a bit and turns down Lesnar's request. Kane then heads to the ropes to leave the ring, Lesnar suplexes him, they brawl, Lesnar then traps Kane in the Kimura Lock and breaks his arm. Because of Kane being part of The Authority, Lesnar is indefinitely suspended by Triple H and Stephanie immediately after. Then two weeks after, Kane announces he is suing Brock Lesnar for assault and battery so we get a whole bunch of those David Otunga lawyer segments, up until the night after Money in the Bank, Kane returns as the masked Demon and then challenges Lesnar to a match for SummerSlam. Heyman immediately accepts and says "My client Brock Lesnar will conquer you just like he conquered your brother The Undertaker" And the match is set for SummerSlam and Lesnar returns later that night after Kane's main event tag match teaming with the Big Show. And there's a bit of a long term feud right there.