That animation is godly, and if Flandre is confirmed, Remilia (and hopefully Patchouli) is as well. And, as someone on /a/ pointed out:
>>This is being put out by the same people who did Kara no Kyoukai. If you don't know what Kara no Kyoukai is, it's arguably one of the best OVA series ever. They do not do shitty animation. Even from the standpoint of not being a huge Touhou fan or anything like that, almost everyone on /a/ should watch this for just the beautiful animation.
So yes, I am absolutely looking forward to this. At the very least, it will be beautiful to look at.