The prototype should be unveiled soon at the Tamashii Nations event.
I complained, but I now also have all the preorder tabs open.
In case anyone's interested, here's the previous links collected together:
BigInJapan (24390, 3700 shipping*): https://www.biginjap.com/en/completed-models/19726-macross-delta-dx-chogokin-vf-31a-kairos.html
Anime Export (23800, ??? shipping*): http://www.anime-export.com/product/37625
CDJapan (27216, 2110-3700 shipping*/**): http://www.cdjapan.co.jp/product/NEOGDS-252726
Nippon-Yasan (23080, 2290-22504 shipping*): http