This is by far one of the most impressive renditions of the Batman Beyond Batsuit for Bruce Wayne to don. Seriously, you done all the right things for the colors, the brightness, and the setting. The glow from the bat logo is awe inspiring and allows me to catch the glowing eyes much better, as well as give a nice haze to his body armor and accent the crimson interior of his cloak.
The lights of the seedy city that is Neo Gotham of the future makes it look very appealing, while we all know what really goes on within its deceptively appealing lights and immense towering metropolitan landscape. Makes a good backdrop and makes Batman's dark colors stand out that much more.
You are a talented artist and a great artisan with Photoshop. Five Stars from me!
I think for a visual appearance, the cape looks great, but as you said, highly impractical.
And yes I have XD GOD, I'm excited that Deathstroke is finally important to a plot in a DC game to my knowledge. I know he was in Injustice, but... ^^ Not to mention I've been hoping that Black Mask got some screen time more than the little cameo at the beginning of Arkham City.
It would have been nice if, instead of the tiny wings he actually had, he had the ability to retract the cloak into the suit for when he was brawling, like he did for that very short segment in The Dark Knight, just before he glided into the building in China. That way, he could still deploy the cloak for intimidation when operating from the dark.
I never had a problem with the wings and all but maybe there'd be something to get the cape to form the same sort of wings for when he glides around, and the retractable cape would work rather well so that way the thing wouldn't get in the way of him when fighting the many goons out on the streets.