They should add ghost rider.

He will work slightly like hulk. He is basically a normal person, maybe a little stronger than Bruce, but when he gets killed or builds up enough damage blocked then he will transform into the ghost rider. In ghost rider form he should ride around on a motorcycle, he should have 3 abilities and 1 attack in this form. His attack should be his chains used like a whip, his first ability should be him doing an AOE attack by swinging his chains in front of him. His second ability would be him wrapping it around an enemy and stunning them after bringing them towards themselves, like bucky but with stun and flames. His third ability should be him going faster on his motorcycle and leaving a trail of fire. And his ult should make him one shot a single enemy by taking their soul and then spewing fire everywhere, like supernova.