Channelknight Fadran

Give me a Batman + Superman movie where Wayne Enterprises attempts to collaborate with Lexcorp in a clandestine operation to dig up the dirt for special investigators Clark Kent and Lois Lane. Batman and Superman are both well aware that Lex Luthor is planning some sort of world-dominating superweapon, but exhaust every option they can find to tackle the situation without putting on the suits and beating the schnozz out of some robot goons because both of these heroes exist to prevent casualties; not punch bad guys.

Of course, it wouldn't be a superhero movie without some superhero action sequences, but for the grand finale I'd love to see the two of them working together not just to beat up Lex Luthor's kryptonite megarobot, but to actively contain as much collateral damage as inhumanly possible. Both of these characters are incredibly competent and genius-level superheros, which I would love to see portrayed in a highly-intelligent fashion.