I think WsW's backstory may have more depth than we thought.
Who's Who was arrested 12 years ago. Lots of stuff happened around that time period. The most notable event, is the death of Fisher Tiger. I think WsW was one of the people assigned to go after Fisher Tiger. This revelation would make Jinbe vs WsW more personal.
Another thought, WsW and Queen's hybrid forms were revealed in the same chapter, I think there's a non power level related reason behind this. We know that both of them worked for the government in the past. I think it's possible that Queen may have been friends with WsW's parents in the past. We know that CP-9's parents were members of CP-9 in the past, WsW's family has probably served the government for a long period of time. Some of WsW's relatives probably had high positions in the government, I don't think they would be happy about their family member being thrown in Impel Down. Maybe we'll see some members of the Revolutionary Army related to WsW in future arcs?
Final thought, we know that WsW is obsessed with hierarchy and strength, maybe that obsession transpired out of an inferiority complex?
@playa4321