AJ Styles is making headlines all around the professional wrestling universe, and it's quite heart-breaking that the man is on the verge of being sidelined after a legitimate injury in a live event at M.S.G.The injury was considered a work initially, but Dave Meltzer's latest instalment of Wrestling Observer Radio has suggested otherwise.AJ Styles Legitimately Hurt at Friday's MSG Event #News #WWEhttps://t.co/H2QWUwDU8x— Ringside News (@RingsideNewscom) March 18, 2018Judging by the current speculations, Styles' injury could end up being a serious threat to his WrestleMania dream encounter with Shinsuke Nakamura.Therefore, the company could be searching for few potential replacements. Here are four Superstars who could replace "The Phenomenal One" in the WWE Championship match at WrestleMania 34.Honorable mentions:3. Baron Corbin2. Bobby Roode1. Rusev#4 Randy OrtonThe main event needs a legitimate superstarSmackDown Live's lacklustre creative booking has tarnished the essence of the brand and if there's a momentous time to click the reset button, it is now.There's no way you could talk about the main event, and not consider "the Viper" to be a part of it. Despite disappointing with his stale character enactment, Orton still carries a strong resume, to headline the blue brand.His US Championship program has been hurting his credibility quite lately. Therefore, a promising heel turn could rejuvenate his career back to relevance.