#7 Lars Sullivan
Lars Sullivan was promoted to the main roster alongside the likes of Nikki Cross, EC3, Lacey Evans at the beginning of 2019. But on the day Sullivan was expected to debut, reports suggested that he had suffered an anxiety attack and was sent home.
Interestingly, he later made his debut the night after WrestleMania where he attacked Kurt Angle before going on to attack a number of other stars including Rey Mysterio and The Hardy Boyz. Sullivan was then drafted over to SmackDown where he started a feud with The Lucha House Party. But a few weeks later, it was revealed that The Freak had suffered a severe knee injury during match against the trio which would sideline him for up to nine months.
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This timeline would see Sullivan make his return in time for WrestleMania, but recent reports surrounding the former NXT star have revealed that he could be missing WrestleMania this year with his expected return date around June instead.
Sullivan has had a number of personal issues throughout his career, but hopefully, he's able to put that behind him when he returns to WWE later this year.