Neither nVidia or Intel will be able to buy AMD as a whole, nVidia would get a GPU Monopoly, or Intel would get a CPU Monopoly.
So although I (kinda) hate Samsung, I hope they pump a lot of money into AMD.
However, I don't think AMD fits Samsung well, as Samsung is into mobile CPU's, and AMD is really power-hungry.
Samsung might be interested in the APU departement for phones.
I saw some rumor about AMD developing an APU, that would have the power of an r9 290x, but with a total TDP of 300w.