This has been discussed ad nauseam. The FTC would object vociferously to having one company own both branded Copaxone and the obligate technology for making a generic version of Copaxone for the US market.
I agree with that.
But let's pretend I'm Teva. Speaking hypothetically, if my biggest concern re: MNTA is m-copaxone, then I would buy the company now and divest the m-copaxone "franchise." That may let me stay on good terms with the regulators, and by divesting m-copaxone but keeping the people, i basically make it hard for the purchaser of the m-copaxone estate to capitalize on their asset.