While it is somewhat farfetched, I wouldn't put it past Teva if they looked to buy Momenta and fund the whole transaction by selling Momenta's portion of the copaxone franchise to Sandoz.
That would also not fly by the FTC/DoJ very well. You are still putting the only 2 potential Copox products in the same hands.
EDIT: Miss-read your post, I agree that would work but why would TEVA care to do so?
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