I hope that they bring her back, either older and wiser, or more of a powerful, credible threat. It's always cool to see the potential that a character may posess. This pic is an excellent possibility.
Hmm, I wouldn't mind seeing her come back for revenge but I would also like to see her try to be nicer and make up with Twilight and the other ponies.. Hmm. I think it seems more likely she would come back for revenge though. I'm not sure what I would want to see... But this looks great! I like the cracks beneath her and her eyes! Oh, and I really like her mane!
I hope she remains an ambiguous character. She wasn't obviously bad or obviously good, you could spin her either way -- and fanfic writers and artists have done so. I think it's good to have some characters around who don't fit into neat black-or-white categories.
The way I see it, they can go two ways with it. One, she comes crawling back and the Mane 6 forgive her and help her get back on her feet. Or two, she comes back like this and gets beat again, in which she learns the lesson of humility. Either way is fine for me, I'm just glad that they're bringing her back. Now lets push for more Luna!
Assuming she does show back up, I'm hoping they give her some actual depth this time. She was little more than a superficial antagonist before, which probably explains why the fans that liked her anyway made up an entire backstory for her. Now the writers have the opportunity to have her learn from her mistakes and grow a bit as a character for a change. I'd be up for that, seeing as she does have a pretty color scheme and all. LOL
Points of view I guess, or maybe it's just because I'm writing that story that I believe she needs another way to redeem herself. If you're willing to waste some time, try to check out the story I've wrote. Criticism is always accepted