I think making The Riddler a Private Investigator would be a safer choice than making him a Fed. The Riddler wouldn't work as a Fed because hes not the type of guy to get physical. They could have a new Mayor who doesn't have Faith in the police, so he hires Nashton to find out who the Batman is.
Who says the Feds always have to get physical? Lots of them are in the bureau to act as strategists, profilers, lab work, desk work. A man like Nashton has surely a position that suits him like a glove.
Besides, Private Ivestigators not being physical? ?? Most famous ones in literature are. Ever head of Sam Spade? Phillip Marlowe? And I'm bringing fiction guys from the forties because that's the only way the concept works. See "Gone Baby, Gone" to realize that the Police never asks for the help of P.I., because they have an amazin amount of recources that freelancer just don't have and would really, really need. As a result, P.I.'s end up doing small jobs... infidelities, kidnappings... but for a big time job like catching the most resourceful number 1 public enemy... the BATMAN... no man, the most intelligent man on Earth can't do that without police resources: lab work, human resources, etc.
It just seems like one of those ideas that just look good on paper. If you put on film It wouldn't end up not really seem like The Riddler. It actually sounds like something Burton would have done if he made a 3rd Batman film.
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This actually doesn't make any sense... you know that?
The riddler being a p.i. works better than him being a fed because it at least aligns with the character's inherent self-interest. Nigma signing up with washington to enforce the law is a real detrement to the tradition of his character.
Not at all, do you think everyone in the force is there to serve and protect? Why? Our Fed Nashton is there for personal gain, because he enjoys power, and exercising power. He enjoys controlling so many people, he enjoys proving he's the most intelligent, he enjoys the pride, he enjoys the competitive enviroment, he enjoys escalating in the job... he enjoys being the best.
Once he gets expelled from the FBI and targeted as an enemy, then we'll see a guy who wants to get rich to fund his riddler death traps and satisfy his interrogations. To find out the things he desperately wants to know.
Do you think this still detracts from the Edward we know? I don't think so. We all have to remember that Edward was an employee before becoming a super-villain, and that previous time can be exploited VERY well in the "Batman hunt" plot to characterize him. This is, by far, the best idea I've heard. And that's why people keep repeating it. It's good.