It didn't really register until after the new sci-fi anime had premiered, but the sixth Gargantia on the Verdurous Planet key visual is must see, and surprisingly lighthearted for a show from Madoka Magica and Fate/zero writer Gen Urobuchi.
Bellows (Shizuka Itou - Hayate The Combat Butler's Hinagiku Katsura)
Hideaki Tezuka's Ferrock with Sayaka Ohara's (Fairy Tail's Ezra) Rigid
Sora Tokui's (Milky Holmes' Nero) Miter, along with Katsuyuki Konishi's (America in Hetalia) Pinion
From the Gargantia Logbook
Newtype Ace cover
Blu-ray set cover