#1 Becky Lynch
Whilst Becky Lynch won't be on the shelf as long as other Superstars on this list, her injury may have been the worst of the year.
Turning heel at Summerslam 2018, Lynch has reinvented herself, becoming the company's most popular star, with her devastating promos and cocky attitude.
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Unfortunately, on the go-home RAW to Survivor Series, The Man suffered a severe concussion and bloodied nose, courtesy of the #FaceBreaker Nia Jax.
This injury instantly halted all plans the company had for Lynch going into the pay per view, with the Lass Kicker choosing former friend Charlotte Flair to face RAW Women's Champion Ronda Rousey in a cross-branded contest.
The only good side (if there is one) to all of this, is that the fans are still very much behind Becky, showing her true star power despite not competing.
This bodes well for the Lass Kicker, who is hoping to return very soon.