#1. Men's Royal Rumble match

Unlike last year, the Men's Rumble match will most likely be the main event. Last year, a big streak was broken. From 2011-2017, the Royal Rumble match winners were extremely unsatisfactory in the eyes of fans, with superstars like Batista, Roman Reigns, Randy Orton, John Cena, etc. winning and making it underwhelming.
However, 2018 saw Shinsuke Nakamura win the Royal Rumble match, and 2019 will very likely be the same. Unlike the last few years, we won't really be having the presence of part-timers.
Even John Cena, the only part-timer in the match, is unlikely to even participate due to an alleged ankle injury. Kurt Angle is rumoured to return too, but he obviously won't win it. Seth Rollins is the favourite to win the Royal Rumble match this year, and given the hot run he had in 2018, fans would most definitely love to see The Architect pick up a Rumble win and secure his ticket to WrestleMania.