#4 Big Cass
The 7 footer was all set to receive a decent singles push when he was turned heel earlier this year, but it was all halted when he got himself injured during a Brooklyn Street Fight against his former tag team partner Enzo Amore on the August 24 Episode of Monday Night Raw.
It was reported that Cass underwent a surgery for a torn ACL and it would take nine months for him to return to the ring. While this is the actual time frame mentioned by the WWE for his return, we all know WWE exaggerates the injuries of its top superstars so that they can pull off a surprise return.
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So, we can expect Cass to make his return to the WWE at the 2018 Royal Rumble.