Big Bad of TTGL in general, so it will probably come over.
The Anti-Spiral is the mayorLet's hope that Nia doesn't let him get too touchy-feely with her.
The Anti-Spiral isn't important to the plot at all, and will just appear in the background at some point.No real evidence for this, I just think it'd be funny to see him in a Burger Fool uniform.
Alternatively, Corset will be the MayorGot to keep those Gainax references coming in somehow. He'll be being forced out of office due to the public finding out about his "hobbies."
Simon will take a level in badass just like in the anime.At some point, Kamina and Kittan will be captured by thugs, only for Simon to barge in and proceed to beat the everloving shit out of their captors. While wearing a dress.
Simon will become addicted to those drugs Rossiu is shipping into the city. Why? Because those drugs are injected intravenously, through those drills we saw. And the name of the drug? Spiral Power.
The entire series takes place in the labyrinth of Alternate Universes created by the Anti-Spiral at the end of the show.And is thus TOTALLY CANON.
The Gurrenrod will be replaced... by the DAI-GURRENRODIt will come equipped with a radio with speakers the size of a picnic basket, will seat 8 normal-sized people (or one Kamina-sized awesomeness), consume gas like it's goin' out of style and - best of all - will have an entire CLOSET of Simon-sized female outfits. And more. It will be the coolest veichle in the history of media. NO FRIGGIN' EXCEPTIONS.
Kamina gets fired by Genome, Simon takes Drill Bit drugs to cope.Eventually, Genome is going to fire Kamina(For what ever reason; personal spite, or maybe Kamina did something really bad, like, something that someone has to take the fall for, and while Kamina leaves willingly, leaving the city. Simon can't handle it; so he then he gets contacted by the cartel moving the Core Drills, and Simon uses them into order to do police work. However! The drugs start making him more depressed when he's off of them, which spirals him into despair... And then he figures out that Nia is working for the Anti_Spirals (Who is, lets just say, an underground mafia organization with dirt on Genome). When everything looks dark and bleak, Kamina comes back. He knows that if he interferes with the police, he's going to get into some serious shits, which may end up hurting Simon or anyone else he cares for, so he does one thing; punches Simon, and tells him to get his act together. Kamina then gives him a speech about being the best cop, and Simon goes cold turkey on his Core Drill drugs, and becomes and mamly police officer worthy of Kamina's praise (Which then starts season two of the Captain's comic; Spiral S, which finishes up his story with Simon as the main character).
Rossiu is also running for mayorAnd he plans to plant drugs on the police station cheif, Genome, in order to slander Nia's name. Rossiu also tries to get rid of Kamina and Kittan, being that they are too destructive. However, Rossiu is actually a pawn of the Anti-Spirals; a criminal organization bent on taking over the town and hording all the Core Drill Drugs. And while Kamina and Kittan try to fight they way out of the mess, they lack any way to convince Rossiu of kicking them out... Until Simon comes in with evidence to use against Rossiu. The evidence is so powerful Rossiu withdraws his order to fire Kamina and Kittan, and lets Nia win the position of Mayor. And when the Anti-Spirals find out, they used plan b: Brain-wash Nia into their control, wrecking havoc in the city after Nia fires and jails Genome, Manima, and Kittan from the police HQ, blaming all of police work. Kamina and Kittan go after the Anti-Spirals along with Genome after they bust out of prison spectacularly, while Simon has a I Know You Are In There Some Where Fight with Nia.
LagannHear me out on this theory, its gonna get a bit strange. Essentially, the Drills? Not a drug, or at least, some of them aren't, some of them are genuine Core Drills that the Big bad is trying to hide. simon will eventually find one and, around the same time, a familiar looking Simon sized machine with a face for a body. simon will then turn Lagann into his equivalent ride to Kamina's Gurrenrode and Kittan's King Kittan GSX. How you ask? By being able to turn the feet into a trio of wheels and use the jet, thats how. And if this does happen, eventually it will combine with the Gurrenrode to form the Gurrenrode-Laggen... or perhaps a three way combination, to form something like a King Gurren Lagann cruiser/mech.
Predictions for future character rolesLet's just brainstorm how the other characters from Gurren Lagann could fit in to the DOUBLE K universe, shall we?
Kittan is faking the whole "I lied about my perfect record" thingHe's actually trying to haze Kamina as well.
Rossiu will turn out to be a Red Herring, or at least not the real bad guy.Rossiu wasn't really a bad guy in the main series after all. He just did what he thought was the right thing, even if he was seriously Wrong Genre Savvy about it.
Chief Genome ships Simon/NiaHe's made it clear that he doesn't mind Simon and thinks he has the makings of a damn good cop, so long as he's not wearing a dress, and seemed near desperate to get him away from Kamina's influence. He just doesn't want a cowboy cop for a son-in-law. And now that Simon's proved that he'll step up to protect her, I can see Genome pushing her towards him if he goes to do a heroic sacrifice later in the series to stop the Spiral and redeem himself as a cop and/or father.
There will be Time SkipKamina and Kitan will get themselves into some big trouble that will put them on a bike (arrest, transfer, etc.) and next thing we'll see a Time Skip with Simon taking the lead. He became a proper badass and after some time he'll be joined by Kamina and Kitan forming a trio.
Genre Shift will happenFollow up to WMG above, the genre will shift from 80's cop show to 90' style