It would be cool if Todd Phillips made the sequel about Batman battling The Joker, and just called the movie Bat-Man. Since this would be more Elseworld-ish, keep it in the same vein of being ultra grounded, and have Batman be way more realistic than even Nolan's. He wouldn't have a traditional Batsuit, instead, he would have combat boots, kevlar vest, a black trenchcoat instead of a cape, and a leather cowl...short ears. Nothing too fancy. His "Batmobile" would just be something like a 70's black Chevelle SS. Keep it an R rating, and let Todd Phillips do his thing.