#3 Pipebomb against Brock Lesnar, dethroning him as the WWE Champion
CM Punk was arguably one of the better in-ring performers during his stay with the company until 2014, but the biggest highlight of his career was something he did while sitting on the ramp with a microphone in his hands. Yes, we are talking about Punk's famous Pipebomb that is etched into the minds of every wrestling fan forever.
What better way to announce his in-ring return than dropping another one of those Pipebombs against a former rival who has risen to the top of the WWE food chain in Punk's absence - Brock Lesnar.
Remember the epic storyline of Paul Heyman turning on Punk, leading to a showdown between he and Brock Lesnar at SummerSlam 2013? Well, Punk probably still wants revenge for that loss at the hands of 'The Beast Incarnate.'
One thing is for sure, the returning storyline for Punk would be a massive one, and what better way to bring him back into the fold than by reigniting an old feud against his arch-nemesis, Lesnar. With Heyman being the Executive Director of RAW and a close real-life friend of Punk's, he could certainly convince him to make a return against his client.
Moreover, imagine the pop Punk would get if he returns, defeats Lesnar, and reclaims his WWE Championship? Let's get those "CM Punk" chants going wrestling fans.