In Japan there is a celebration of Takahashi's 30th anniversary creating manga. At this event a new episode of the Ranma Anime is to be released. The new episode will be based on the Spring Sleep storyline from Volume 34 of the manga. Which was one of my favorites. I like the art style in this, I like the character interactions, and I like Ranma's ki blast (which appears to be a combination of the ShiShihadoken and Moko Takabishi). Overall the opening video is very good. It would make an awesome crossover.
For more information check here: "It's a Rumic World" Event Coverage
Here is a video of the opening sequence:
Here is the video with fan subtitles: