If that's the case, they're playing hasard with the future of their Keytruda revenue, since DCVax-L will increase its efficacy with probably most pd-1 inhibitors and thus Merck are willing to let BMY or Roche get the first shot at obtaining NWBO.
That would be in line with Kevin Duffy having wasted his time getting Keytruda into the UCLA SPORE 1 project, the combo trial with DCVax-L, instead of Opdivo (Nivoluzumab) from BMY and Linda Liau having already presented great results from this combo trial at three occasions.
But you ARE correct.
Merck would never be allowed to obtain NWBO for a price tag of ridiculus $30B.