Nah, Mars should do the green shirt look. It's literally the look he wears in one of his most iconic scenes ("You ever dance with the devil..."). Also, he wears the green shirt MORE throughout the film. He only wears the orange shirt during the commercial, the museum scene and the parade/cathedral climax. Green shirt he wears every other time he's in the purple jacket/plaid pants. If Mars did the green shirt look, collectors would basically have every MAJOR look. So, I want it for that reason, and I know I'm not alone.
Returns Penguin/Catwoman, Forever Two-Face are more needed and should get more resources devoted to getting them out. But that green shirt look would literally take less development time (one shirt, two ties, a few scene specific accessories; derringer pistol, boxing glove gun, party favor, cracked Alicia mask, etc.) and would be a good holdover until we can get those. Personally, I'm most looking forward to TLJ Two-Face. Penguin and Catwoman are going to be trickier figures to get right IMO. I have faith based on how everything so far has turned out, though.