#8 Hope Not- Shawn Michaels vs The Undertaker at WrestleMania
Shawn Michaels made his in-ring return earlier this year at WWE Crown Jewel. There he and Triple H took on the duo of The Undertaker and Kane and came out victorious. Though HBK performed a little bit rusty at the PPV, still a door is open that we might end up seeing at least one more match between HBK and 'Taker ( more than HBK vs AJ Styles).
Though the idea of HBK vs the deadman is not bad, if it happens at next year's WrestleMania then it'll be nothing but more than a nostalgia act. Since (no offense) HBK and 'Taker has clearly aged and I am afraid that if a big stage such as WrestleMania will be given to them, we might see maybe one of their worst matches ever.
#7 Hope True- Brock Lesnar vs The Rock
The last time when Brock Lesnar and The Rock step foot together in the ring was at 2002 SummerSlam where defeated "The Brahma Bull" to win the WWE Championship. Since then, the two men aren't seen together sharing the same ring.
According to the rumor, The Rock is currently favorite to win next year's, Royal Rumble. And also, he is currently favorite to main-event the WrestleMania against Brock Lesnar with the WWE Universal Championship on the line.
Due to Roman Reigns recently walking out of WWE to fight Leukaemia, WWE might be considering to bring more star power to the company and bringing "The Great One" into the company after a long time would be a good move.