Hmm.. Some confusion here?
After reading "new Pioneer DAP", I googled that exact term and found the article below:
http://hifipig.com/pioneer-unveils-new-digital-audio-player/
This article was only written about 2 weeks ago (27th March 2017).
It refers to what looks like a new and relatively 'budget' DAP from Pioneer, the XDP-30R, as opposed to the now not-so-new XDP300R (note the extra zero).
Background on the Onkyo-Pioneer collaboration (my memory's a bit fuzzy so I hope I'm getting this right! Please jump in if you know better lol):
Timeline wise, Onkyo released the DP-X1 a fair while ago now. Pioneer also released a slightly lower-spec DAP around that time, but otherwise very similar.
Onkyo then released an updated and improved DAP called the DP-X1A, late last year I think (this was in Japan only, but many were ordering via third party websites, Amazon.JP, etc).
It corrected some quality issues with the previous DP-X1 (faulty jacks), and added a significantly improved amp section (new bigger and better quality capacitor section).
At the same time, Pioneer released the XDP-300R, which was basically just the DP-X1, repackaged.
Meanwhile, the DP-X1A is shortly going to be available for global release I believe.
However, it seems that Pioneer (according to the article I posted above) are now releasing another new DAP. £349 and dual DACs etc. Looks very interesting!