8. Daniel Bryan
Backstage insiders like Dave Meltzer reported over a year ago that The Undertaker was wanting to work with Daniel Bryan. That desire likely still remains, and it stems from his wanting to be matched with WWE's best. The big problem is, WWE's medical team won't pass Bryan fit. However, Bryan has insisted that he is fit to return. His own doctors have passed him the all clear. So the comeback could be soon, and what better way for Bryan to get back in the big time than facing off against The Undertaker? It could be a main event for any of the shows between September and December. With hints that The Undertaker is now a heel, it would also make sense on that front. Best of all, you just know it would be a fantastic wrestling match.