WWE.Com likely took any drama out of the second-chance Fatal 4-way match to become the sixth man in the Elimination Chamber, including Finn Balor briefly Saturday in the promo graphic for the pay-per-view show’s headline match. 
As has been reported, Jason Jordan was originally intended to be in the match, but has forced WWE’s hand in replacing him with a neck injury that required surgery earlier this week. Balor appears to be the replacement, joining John Cena, Elias, Braun Strowman, Roman Reigns and Intercontinental Champ The Miz in the Elimination Chamber match that will determine Universal Champ Brock Lesnar’s opponent at WrestleMania. 
This development also means its likely “Woken” Matt Hardy and Bray Wyatt will have a match at Elimination Chamber. 

Here’s an updated card: 
Men’s Elimination Chamber

John Cena vs. Roman Reigns vs. Braun Strowman vs. Elias vs.IC ChampThe Miz
Women’s Elimination Chamber – Raw Women’s Championship Match

Alexa Bliss (Champion) vs. Bayley vs. Sasha Banks vs. Sonya Deville vs. Mandy Rose vs. Mickie James
Jax will be added to Raw Women’s Championship Match at WrestleMania if she wins

Asuka vs. Nia Jax