These are not in any particular order, though the final 3 are the ones I'm hoping for the most and/or believe have the highest chance of actually being used. Feel free to agree or disagree with me and post your own ideas of better skins. Or post skins that actually will be in the game.

10. Brave and the Bold Batman

In could happen, given that they did do the animated series and Adam West costumes. And his gliding cape could turn into a jet-pack for this skin.

9. Mass Effect Batman

I think this was made by a group of people for fun, but it does still look cool and it could be used for the x-box versions of the game.

8. Nightmare Batman

or

Worst Nightmare Batman

Nightmare was used for the Infinite Crisis MMO, I think, and Worst Nightmare I heard was to be in Arkham Origins, but something prevented it. Either could work.

7. The Laughing Bat (The Batman)

I know that this is Joker in a Batman suit, but I still hope it happens. Why? 1. I think it'd just be an interesting skin given its uniqueness among the others and 2. You can't tell me you wouldn't piss yourself if this thing came at you on a dark night.

6. Flashpoint Paradox Batman

Because I'm honestly surprised they haven't done it yet.

5. The Dark Knight (Batman The Brave and The Bold)

I just like the idea of them going for the literal knight look.

4. The Batman

I don't care what anyone says about this show, I liked it and I think the costume is well done (and I hope they animate the long cape well in the game).

3. Owlman

The idea of playing as evil Batman from another universe who has repetiedly banged Superwoman is very tempting (and I'm going to be really pissed off if it turns out that he's the Arkham Knight).

2. Green Lantern Batman

We've had the Sinestro corps version, I think the Blackest night and Brightest Day were in Arkham Origins. So let's bring on the main course!

1. The Dark Knight Returns armor

I have a soft spot for the graphic novel, the animated 2-parter based on it, and especially this armor. It would only be an alternate skin, so it wouldn't have the strength enhancements that it did in the actual story, but it still looks cool and if it's good enough for Batman to use to fight Superman, that it's probably good enough for you.