ULTRAMAN Volume 2 has been finally announced and is up for preorder!
It will be released March 5 this year.

http://www.amazon.co.jp/gp/switch-language/product/4864683212/ref=dp_change_lang/377-5123215-1476333?ie=UTF8&language=en_JP

However I will remind you all that we're currently in Volume 2, since after all
each Volume contains six issues. But don't look at the cover too much!
Its pretty much a spoiler in what happens later on within the manga lol.

But since we're no longer on Volume 1, I think the cover is in need for an update.
;)