Dean Ambrose

After his return from his injury, there were a lot of things spoken about Dean Ambrose about how he can become the top heel because of his changed gimmick and bulked up persona. But, all that has fizzled out after his lacklustre feud with Seth Rollins and after he lost the Intercontinental Championship from his clutches.
Chances: Extremely Slim
Cody has no chance against John Cena? Details HERE
Elias

Elias was built to be an amazing mid-carder, but not a main-eventer and WWE has been adhering to that idea. Since he has turned into a babyface, Elias' push has somewhat flattened. He was an amazing heel, but he is good as a babyface too. Currently, he is stuck in a feud with Baron Corbin. However, he is balancing it out as he is a very entertaining star himself.
Elias is fun, but that doesn't mean that he is winning the Rumble match. He will score a few eliminations, but that's all we can see from 'The Drifter'.