The Men's Rumble it feels like it's definitely either Cody or Punk, I'm leaning toward CM Punk with Cody getting to Roman via the Elimination Chamber. The Women's Rumble I'm really not sure about, think most people are going to say Becky or Bayley. Becky is similar to Cody where she can get to Rhea by winning the Chamber and doesn't need the Rumble win. For a while, I assumed Charlotte or Bianca would beat Iyo that would then lead to Charlotte vs Bianca for the title at Mania.
With Charlotte's injury, it really feels like anyone could win the Rumble. I'm just not sure if WWE wants the title involved in the Damage Ctrl split, Iyo could lose the title to Bianca then face Jade, who would win the Rumble. While Sasha and Naomi return to help Bayley in a 6 Woman Tag at Mania.
Or Asuka & Kairi win the Tag Titles, Bayley & Sasha face them for the titles, or Sasha & Naomi face them for the tag titles while Bayley faces Iyo for the championship. Jade is the real wild card in all of this, does WWE want to push her straight to the top with a Rumble win and title win at Mania?