The January 21, 2013 issue of Weekly Shōnen Jump has contained an article on Kingdom Hearts -HD 1.5 ReMIX-. This article focuses on the 358/2 Days Theatre Mode portion of the game, containing both screenshots and renders. kazu4281 has uploaded the first scan of this article, and this can be seen below.
Update 1: HD 1.5 ReMIX has also appeared in this month's V Jump with an article, releasing on January 21, 2013. bKvEBVAvUq has uploaded a very high quality scan of this article, and this scan can be seen below, in our gallery. Enjoy!
Update 2: Text at the bottom of the indicates that next month's issue of V Jump will again contain an article on HD 1.5 ReMIX, this time, focusing on the Kingdom Hearts Re:Chain of Memories portion of the game. Stay tuned!