Must avoid doing: Keeping Finn Balor off the show

WWE has kept Finn Balor off of quite a few pay per views over the last couple of months, but all that needs to change when Survivor Series happens next week. Furthermore, WWE at the very least needs to give Balor a role that will put him in a storyline moving forward, which is something WWE hasn't done for months now.
As for how it happens, maybe the rumors of Bobby Lashley being injured are true and Balor ends up subbing for him sometime during the match. At least that will further the storyline between the two superstars and give Balor a chance to shine in a high profile match at an upcoming pay per view.
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Then again, maybe WWE can finally turn Balor heel and have him help cost team Raw the five on five Survivor Series match. If WWE does that, they can have Balor explain his actions the next night on Monday Night Raw and then have him Kurt Angle fire him. Balor can then cement his heel turn by attacking Angle and writing him off television for a while.
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