Sonic Mania Plus will be arriving next week, so it seems like an appropriate time for publisher SEGA to remind players what they can expect with the update. In the latest developer diary, Creative Director Kazuyuki Hoshino and Art Director Tom Fry talk about their collaboration and how this affected the art and design of the game.In the video, you get a look at new playable characters Mighty and Ray in their early form, as well as a look at the new colour palette for Encore Mode. The video then finishes with a teasing glance at the 32-page art book that will come with the game's physical edition on console. Sonic Mania Plus will be released on July 17th. Those who already own the game will get the new content as an update on the same day.