Animation is OVA quality and significantly better. Soundtrack seems to be the same, except for the new theme song. (Crap BTW.) The episode starts with the Meister Otomes gathering in space to destroy an incoming asteroid and ends off with a mysterious attack on the academy by an unknown invader. In between, we have neko ramen, teenage quarrels, Shizuru in swimsuit, and a taiyaki thrown in for good measure.

In the year AD 2101…

…War was beginning.

Doesn’t this remind you of a certain meme?”

Her mother was hotter

Lens flare!

Arinko, save us!

…from the Engrish!

More Shizuru-oneesama please!

Please don’t feed the Fat Taiyaki Fangirl.

kuroitani is now nekogamisan? The old name was cooler

“I want one thiiiis long.”

“Is there actually cat meat in this ramen?”

Her robed form never ceases to amaze…

Brooms are multi-purpose weapons of self defence

Mai has more airtime in this episode than in the entire TV series

Still alive

Her too

This episode needs more Nao and more Shizuru.

P.S. I can’t believe that her name is actually Lena and not Rena. WTF!

[アニメ]アニメ「ローゼンメイデン特別編」→「ローゼンメイデン オーãƒãƒ«ãƒ†ãƒ¥ãƒ¼ãƒ¬ã€ä»Šå†¬æ”¾é€äºˆå®šã€‚

銀様メイン？オープニングはALI PROJECT。

Moonspeak translated:

The new series “Rozen Maiden ~Oubertüre (previously Rozen Maiden Special Chapter) will be airing this winter.
Gin-sama (Suigintou) is rumoured to be the heroine. Opening is by ALI PROJECT.

Thanks to Cherryon from #animenano @ rizon for the help with the German (French?) bit. Let the O___O begin!

EDIT: Gah, looks like the title was wrong. I edited it.