There was no money reported with the Biogen collaboration so it leaves us available to partner with anyone. I'm confident Dr Missling will get the best deal for shareholders.
"Jump over the basket" : Takeda, Utsuka, Elsia, Bayer, (and half a dozen more Japanese and German) and then American under the radar (another 6 or 8)... It is even possible BIIB is a pawn here...