Now I know that both guys are coming back around the same time and I'm sure many would like to see a feud between the two. The first few weeks back for Lesnar, they could go the Mark Henry route with Khali, they could have Lesnar the night he comes back destroy Khali, then the next week, have Khali go after him again but then gets trapped in the Kimura Lock, breaking his arm. Release Khali shortly after that as he's useless (What should have happened after the Big Show chair shots because from what I know, Big Show had some kind of arm injury going into the match and a surgery not too long after that, and that would give a kayfabe explanation as to why he was out of the ring for a while, except without the release part) then keep Lesnar off for a week. Then the Fourth of July SmackDown, Rusev and Lana could go on about nobody being able to stop Rusev and they make a challenge to any American to come out for a brawl. Out comes Lesnar and they have a decent brawl with both men getting offense. Lesnar ends up annihilating Rusev. Then Batista's music hits and he's back. And there's one of your SS main events. Find a way to get the title involved and you have the main feud for the show.