PopQuiz: Can you name the 5 and a half similarities between Kingpin and CapIW? (before reading)
I was contemplating my next rank 4 and saw an unusual amount in common, especially considering KP and CapIW are not the same class.  
1). Shrug Off:  CapIW relies on having the right team so he can 100% shrug off debuffs.  KP also relies on a synergy for the 100% chance.
2) Heavy Attack Fury: CapIW gets a passive fury that is stronger with each kinetic potential.  KP gets a fury buff from 3 landing rapid heavy attacks.  
3)  Special 1:  CapIW's sp1 reduces defensive ability accuracy and inflicts a DoT. KP’s sp1 inflicts a DoT that reduces defensive ability accuracy.   
4) Increasing attack rating without a traditional fury:  CapIW increases attack when kinetically charged.  KP increases attack in overpower mode.
5) Power Control if they have the right team:  CapIW applies a petrify that is useful for power control (if he has a tech on team).  KP can power lock opponent after a special (if he has the masterminds synergy) 
The half) Unstoppable:  CapIW removes unstoppable.  KP becomes unstoppable.  (plus CAPIW can gain unstoppable with the Silver Centurion synergy)