Since BvS is coming, i have a few ideas for how this will all go down, and maybe you guys do too, so this is just for you guys to speculate with me about how this movie might go down.
If Dick is in it I can't see it being a large role. More a role like this..
Superman & Batman need a bit of information to defeat the villain. Batman "someone knows" speechs. "We haven't spoken in years". That introduces Dick and then we see in a small but important role. Maybe kicks a bit of ass with Batman in the climax or before the climax.
IF he is in at all
If Richard "Dick" Grayson is in the movie i hope actor Leo Howard  works to be and becomes cast in the movie to portray him. He wears blue shirt/black pants combinations in many episodes of Disney XD's KICKIN' IT, which would cause Howard's casting to be ironic.
Zack Snyder mentioned that The Dark Knight Returns is only the inspiration for MAN OF STEEL: BATMAN VS SUPERMAN. The inspiration from that comic book includes things such as; Kal-El/Clark Kent and Bruce Wayne's relationship and their battle. But Batman's very positively received speech being included in some way is possible.
Luthor and Joker set Batman and Superman against each other. When they realise they've been played, they work together to stop them, eventually becoming friends.
Anyway, here is my idea (rough draft.)
-Lex Luthor and Bruce Wayne (Maybe Amanda Waller, it'd make sense. not sure.) , noticing a huge amount of Superheroes, decide to put together a team of superheroes (Without the public knowing they're involvement.) to protect the world against potential threats like Superman.
-Meanwhile, Superman, after basically helping with destroying the city, helps civillians and such. He also regrets killing Zod, swearing to never let anyone die by his hands again.
-Lex, without Bruces help, finds a bunch of Kryptonian tech, and makes use of it (Using Zods armor, he creates his signature green suit, finds kryptonite, parts/components to make Metallo, Kryptonian DNA, and other stuff setting up for later movies, etc.)
-Batman is out in Gotham stopping crime. (Cameos from Black Mask and Penguin.) He ends up getting injured, and has to see Leslie Thompkins (played by Holly Hunter.) the next day.
-In Metropolis, behind the scenes, Lex, and volunteer John Corben (Callan Mulvey) are working on a project (call it something like Operation: METAL-0. Doesn't matter.) General Swanwick finds out, and gets killed.
-Lois Lane and Clark Kent are out watching a Football game, Gotham vs. Metropolis. Bruce Wayne is also watching. Cameos from Victor Stone and a scene with Dick Grayson and Bruce Wayne, trying to reconnect after they're falling out. Moments after the football game, Metallo attacks the football game with a gang of henchman, Batman and Superman meet for the first time, fighting Metallo. While the two are distracted, the gang kidnaps Victor Stone, who fights his way through most of the henchman, but in the end fails.
-The next day, Perry White hears Bruce Wayne is holding a press conference, and sends Jimmy Olsen and Clark Kent to be there. At the conference, Bruce announces he and Luthors partnership.
-At night, Batman stalks Superman, attempting to find out who he is, but is caught. Some Superbat-Banter later, Batman starts thinking hes going to attack him, so he literally beats him to the punch, however, Superman wins the brawl.
-Alfred and Bruce talk about how it was stupid and says he should be prepared next time, Bruce says something along the lines of "I have an idea."
-The following night, Bruce Wayne hosts a party, Lois and Clark attend, so does Bruce Wayne and Diana Prince. Bruce Wayne tells Clark he looks like Superman, and in private, asks Lois questions about the Man of Steel himself. Bruce gets a call from Luthor, saying the team is assembled.
-Bruce and Luthor meet at his secret lair, and Lex introduces Bruce to his team, calling them The Outsiders. The team consists of Black Lightning (Dwayne Johnson), Power Girl (Tao Okamoto, casting could be better but I had to fit her in there somehow.), Wonder Woman, and John Corben (In disguise, so no one recognizes hes Metallo.) Bruce recognizes Diana, and asks why shes here. She says she joined Luthor to protect the universe from "Darkseid". Bruce says he is friends with a person who would help, and says where he can meet him.
-At god knows where, Batman and Lex Luthor, meet up. Luthor recognizes its Bruce, but promises not to tell anyone. They then discuss what to do with Superman, Bruce shows Luthor a Power Suit )Inspired by Kingdom Come) hes been working on, and says he won't need The Outsiders help, yet.
-Metallo goes crazy, attacks the outsiders, wins, and starts rampaging around Metropolis, Superman and Batman (wearing the suit he showed Luthor.) stop him, and they notice it has Lexcorp written all over it. Superman uses his X-Ray vision to see who Batman is, and he finds out its Bruce. Superman notices Metallo is Lexcorp, and remembers Bruce and Lex are working together, so he once again, fights Batman. This time, Batman wins, they talk it out, and end up becoming allies.
-It ends with Luthor at a press conference, claiming Metallo wasn't involved with Lexcorp.
-End Credit scene with Victor Stone, who was kidnapped at the beginning of the movie, becoming Cyborg.
What do you think?