I think Pioneer was already being considered as the outsider at the DLBC announcements.... with the later news (never confirmed by Voxx/PAC) that Voxx/PAC had lost the Licence for the Pioneer brandname sort of clarifying things.Dirac never announced DLBC for Pioneer, no surprise here.
On the other side, Pioneer has simplified bass management. Adding DLBM would be a real improvement, something we probably won't get for free.
But so far it is all rumours - with the recent announcements and lack of announcements for Pioneer, seeming to align with the rumours of it having been orphanned.