6. Dean Ambrose
Brock Lesnar has now clashed with two thirds of The Shield, and if that reunion is ever going to happen for real, it's essential that The Lunatic Fringe sets his sights on The Beast at some point in the near future (because, let's face it, The Shield vs. Brock Lesnar would be all sorts of awesome). Fantasy booking aside though, and his would just be a pretty cool match to watch. Ambrose's performances against the likes of Bray Wyatt and Seth Rollins serves as proof that he can really deliver against the right opponent, and Lesnar would undoubtedly also fit that bill. The problem with this match is that like when Rollins went one on one with Brock, Dean would be totally outmatched. However, his unique offence could give him an edge, with Lesnar finding himself overwhelmed by the sudden flourishes from Ambrose. Ideally, it's an encounter which would be best off taking place when Lesnar isn't still magically immortal from beating The Undertaker at WrestleMania 30 so we get a competitive bout. After the other two former members of The Shield got a chance to impress when they took on The Beast, it's now only fair Ambrose gets to do the same...