GungHo announcement: http://mobile.gungho.jp/news/pad/140310_rush.html
So JP is getting a new urgent dungeon that appears to feature only rare evolution materials that are typically obtained through daily dungeons. From the screenshots and banner, it would appear to contain Dragon Fruit, Dub-Mythlits, Dub-Topalits, Dub-Amelits, Keepers of Light, Dark, and Rainbow, Mystic Masks, and Divine Gold and Onyx Masks. Keeper of Rainbow is probably the dungeon boss (thanks for noticing, Gborr!).
In addition, here are some new images!
First off, Ultimate Hatsume! Regrettably, she looks merely posed differently from her final evo form; only the frog got upgraded ;x
Next, Ultimate Kraken!
Ultimate Griffin, who rounds out the Mythical Beast Ultimate Evos!
Finally, here is Gaia, who is a new Conditional Descend boss!
