4. WrestleMania 35
There is very, very little available in the ways of details about WrestleMania 35.
All that is known at present is that it will come live from East Rutherford, New Jersey and air on April 7, 2019. But the thing about Wrestlemania is that it's ALWAYS going to create buzz just by virtue of being WrestleMania.
For the time being, fans don't know what matches might take place. However, rumors always abound. One of the big feuds being set up is rumored to be Rey Mysterio vs. Randy Orton. The two veteran talents have a lot of respect for each other, and have never really worked a major feud together that was given the full attention necessary to create great drama. Again, this is just a rumor, but the signs seem to be pointing toward this match happening.
Another rumored encounter is Dean Ambrose vs. Seth Rollins, possibly in a Steel cage match. WWE wants to milk the feud between the former Shield Brothers for all it is worth, and what better stage for such an encounter than WrestleMania?