Hmm? i just thought of something... What if The Riddler wasnt intentionally a villian but someone who thought he was doing some good...
He'res an idea...
since The Joker brought chaos to Gotham... a new sense of hope comes in the form of the Sionis.Corporation - it is considered a rivial to Wayne.Enterprises however Sionis rises to fame by its charitable donations after what happend with the Joker in "The Dark Knight" - However the Sionis.Corporation isnt as good as people think they are, infact what lies beneath the surface is an extensive Mob connections who was serverly crippled by The Joker's actions that they have colaborated the rest of there money into this new corporation. But non of this matters as crime is at an all time low and Batman is on the run. Bruce naturally gives up his mantel to take a more active interest in his company. Everything seems fine... to Bruces knowledge the Sionis.Corporation is a genuine company looking for some recognition and he only considered them an equel not a rivial. To of which makes him ponder weather Wayne.Enterprises should do more for gotham... This is where we bring in Edward Nashton and Employee of Sionis.Corporation. He was under the understanding that his department in research for being used to help gotham city with technology advances and better equipement for things like hospitals and laboratories... He was wrong, unbeknown to him Edwards work was being sold on the black market, too which Edward learns that because of his research evil things have happend... like mobs breaking into banks and being undetected...etc along those lines... With an absense of The Batman, Edward decides he can outsmart his company by taking them, member by member. So what we get is Edward trying to destroy the public image of Sionis.Corporation and its board members... This is where Roman comes in now he is essientially not going to play the role of The Black Mask... but only that of a business man like Bruce but has ties with the mob too which we have already seen previous two films before. The idea is simply that The Riddler, is trying to cause maximum choas by trying to bring down what looks like a good company but is really a mob laundering service. See The Riddlers take down of each board member would have adverse effects which then makes the threat more public over gotham... Like one board member is driven to suicide, another is caught in a bank robbery but he shoots his way out... eventually The Riddler manages to hack into every computer and starts his viral campaign against the Sionis.Corporation... So where does bruce come in, Bruce has decided to give up the bat suit so instead of going down this root and him believing sionis.corporation is just a target of an internet nerd Bruce strikes up a deal with Roman so that the Sionis and Wayne enterprises join forces, Bruce gets good publicity but Roman gets the better deal because he will use Waynes connections to further the underground mob connections... As The Riddlers threat gets larger and larger, it strikes to close to home when Edward hacks into Wayne Enterprises and learns that they used to make the batman accessories... although there is no information of the identity of batman... With this and the constant threat of more board members doing drastic measures to keep themselves from being named by the riddler... Bruce returns to becoming the Batman.
What you got to remember is that The Riddler believes he is doing good - but his little viral campaign has caused a domino effect and although he is only looking at the small picture, he is effecting the bigger picture which is gotham itself.
Just think about the ending, The Riddler is caught by The Batman and prisioned... but the Riddler reveals all his findings about the Sionis corporation and that Wayne Enterprises has been had.
So essentially it sets up Roman Sionis to be The Black Mask for the 4th movie if made...
So how does that sound?