From what I gather, there is a contest going on for the new title in which contestants submit ideas or illustrations of character equipment. The winner gets their designs integrated into the application and the winner's character can wear the design as well. According to the website the event runs from September 16 to November 16 of this year. More information can be acquired here: http://newworld.bn-ent.net/sp/contest/
Note: the webpage is in Japanese. Google translate can help you get the gist of it though.
Anyways, it sounds like a very interesting idea to get newcomers pumped up about the New World. If you are planning on submitting your ideas I wish you all the luck!