WWE and Celtic seem to be a bit of a common theme over the past couple of months. CM Punk kicked it all off back in June when he was pictured in the Celtic Superstore at Parkhead ahead of the Clash at the Castle event in the Hydro that weekend. And after he denied Rangers supporting Drew McIntyre his chance of winning the title, CM Punk then took in post-match interviews decked in Celtic gear that had all the Celtic fans buzzing that weekend. Then after that, we discussed how WWE superstar Sami Zayn was filmed in Celtic clothing promoting his new comedy show, Sami Zayn & Friends Do Toronto whi…