Bumping/ necro-ing the hell out of this because of the OVA/ Episode 13 (said "fuck it" and watched the raw):
What I made sense of without subs...
The little sisters have fallen ill, said illness causes them to apparently sleep indefinitely and weird twists in their dreams (not spoiling the twists, it's too damn funny)
Nepgear gets tossed in the Conquest Ending...
Uni is hanging around with her sister...
Rom and Ram are thrown in their wedding...
Anime Ultradimension is visited, assumedly to get the cure, only by Neptune and Vert.
They can't use goddess form, and Nep landed on V Noire.
A V dungeon reference? (being able to jump and dangerous species from that game, I assume)
Peashy gets to kick ass, and we get a permanent warp point in between the anime Hyperdimension and Ultradimension, also with a bunch of nice ending scenes.
Throughout the episode there's also subtle call backs to previous episodes. (the "spoilsports" line and others)
In short, for those that got depressed by Episode 10's ending, this purely fanservice episode should be awesome.
Edit: also (after having played mk2) I found amusing how all the Oracles not named Histoire never got any screentime, well, Mina and Kei have a cameo in the first episode, at most. Chika never appeared aside from the chibis in the ED sequence and
with the bunch of plushies Plutia made at the ED sequence of this episode.