Undisputed WWE Universal Champion Roman Reigns is one of the very best wrestlers in the world. It can be argued that he is the best heel in the business. However, some believe that Dominik Mysterio might have a say in that regard.Dominik Mysterio started his career as a generic babyface, winning the tag team titles alongside his father, Rey Mysterio. However, since joining forces with the Judgment Day, his performances as a heel character have seen fans appreciate him tremendously.Rey Mysterio vs. Dominik Mysterio was one of the most anticipated clashes on the WrestleMania 39 card. The Master of the 619 came out on top, much to the crowd's delight. Dominik and Damien Priest ambushed Rey and Bad Bunny on RAW after WrestleMania. Priest even put the rapper through the commentators' table.When the Judgment Day came out on WWE SmackDown, the crowd drowned out Dominik with heavy boos. It was a testament to his excellent heel work over the last few months, and fans on Twitter showered him with praise.Wrestle Ops@WrestleOpsINSANE HEAT ON DOM#SmackDown165881404INSANE HEAT ON DOM#SmackDown https://t.co/S9EqF8V2VrDom@Underrated_Dom@WrestleOps Hands down the biggest heel in the company, doing a better job than Roman and he doesn’t need the titles for heat.113021@WrestleOps Hands down the biggest heel in the company, doing a better job than Roman and he doesn’t need the titles for heat.# 2 Pick In Draft@AyooTexanNation@WrestleOps This is simply why he HAS to win a title at one point. He's easily the biggest heel in the company right now76@WrestleOps This is simply why he HAS to win a title at one point. He's easily the biggest heel in the company right nowPortlandisBURNING (thought criminal)@PDXsBURNING@WrestleOps Easily the loudest the crowd was all night. Loved it.17913@WrestleOps Easily the loudest the crowd was all night. Loved it. https://t.co/CC67B71lgcAngelo Carriero@AngeloMediaLex@WrestleOps Crowd thinks they can get to him? That man did hard time. He’s unbreakable.119@WrestleOps Crowd thinks they can get to him? That man did hard time. He’s unbreakable.Miguel Madrigal@IamBlackbeard_1@WrestleOps This is awesome3@WrestleOps This is awesomeMiguel Madrigal@IamBlackbeard_1@WrestleOps This is some nuclear heat ….414@WrestleOps This is some nuclear heat …. https://t.co/7UA3U11IhwAshyr@ashtonphoenyx@WrestleOps I think all of Judgment day should be holding titlesRhea has the smackdown wcDom and Damian should have the tag titles eventually, and Finn can get the US or Intercontinental@WrestleOps I think all of Judgment day should be holding titlesRhea has the smackdown wcDom and Damian should have the tag titles eventually, and Finn can get the US or IntercontinentalLittleMixFloxChloexHalleStan@troy4783@WrestleOps He’s honestly killing it !They need to split the tag belts up and put one of them on The Judgement Day as well there long overdue a tag reign ! #SmackDown441@WrestleOps He’s honestly killing it !They need to split the tag belts up and put one of them on The Judgement Day as well there long overdue a tag reign ! #SmackDown https://t.co/HQxXNOLChvMarie@mrsmduvernois@WrestleOps I haven't seen this kind of reaction since Elias and KO dissed Seattle133@WrestleOps I haven't seen this kind of reaction since Elias and KO dissed Seattlesweetermansdan ✌🏾 fight on@kabongodan99@WrestleOps Best heel in the bussiness and he doesn’t have to insult your city to get heat50@WrestleOps Best heel in the bussiness and he doesn’t have to insult your city to get heatsami zayn szn #2k23@Angie_wrestling@WrestleOps He's better than Roman@WrestleOps He's better than RomanD’Or 🔜@Haa7and@WrestleOps We’re watching generational talent right before our eyes1701@WrestleOps We’re watching generational talent right before our eyesCon ✌️@conf82@WrestleOps Biggest heel in the company. Amazing rise the last 12 months5@WrestleOps Biggest heel in the company. Amazing rise the last 12 monthsRhellic@Rhellic@WrestleOps Dom is a Hall of Famer already.90318@WrestleOps Dom is a Hall of Famer already. https://t.co/cILuaz6eH8𝐚𝐝𝐚𝐧@lokibucky3@WrestleOps Got more heat on him than Vince damn8316@WrestleOps Got more heat on him than Vince damnDr.Doom@CheeseOnTofu1@WrestleOps I haven't seen this much heat on someone since Big Cass turned on Enzo.@WrestleOps I haven't seen this much heat on someone since Big Cass turned on Enzo.WWE legend Teddy Long spoke about Dominik vs. Rey Mysterio at WrestleMania 39Many fans expected Dominik Mysterio to overcome his father at the Showcase of the Immortals. However, Rey Mysterio came out on top after assists from Legado Del Fantasma and Bad Bunny.Speaking on The Wrestling Time Machine with Bill Apter and Mac Davis, Teddy Long stated that Dominik would have benefitted more had he come out on top in Hollywood."I thought Rey puts him [Dominik Mysterio] over, tax the rate right at the end, they kind of break that up, and get them out of there. Then maybe on RAW that Monday Night, they are talking to Rey about you went down with your son, how does it feel, get some comments, and here comes Dominik again, drops him right in the interview set. That's how you get real heat," Long said. [From 10:44 to 11:06]While fans' reception towards Dominik was initially inconsistent, he has improved and gotten over with the WWE Universe. While he has been a champion before, he is yet to win a singles title.A future feud for the United States or Intercontinental Championship could be the next step for the talented youngster.