Alrighty, it's past midday now (in NSW), so yeah this is an April Fools joke. Tried my best to make it as believable as possible. I updated the Takara Tomy logo, added the new Diaclone reboot logo, "do not distribute" watermark in Japanese (thanks Gok) and generally tidied up the box as best I could. Also warped the angle of the box so you wouldn't be able to do a reverse image search.
Here is the original image for comparison:


It would be nice if a PC DX reissue actually did happen!