China seriously needs to leave Tibet. If they don't, I'd contemplate going to Tibet to help organize a resistance! (experience isn't a requirement, right?

)
In TNG the Romulan warbird was usually considered to be on equal terms with the galaxy class (if one was speculated as superior over the other, it would have been the warbird), so it probably would be a "Pyrhic victory" as the survivor would be barely hanging on.
The end of Nemesis did leave Romulan/Federation cooperation as hopeful, but all the back story I know of indicates relationships falling apart.
Oh, and in terms of underhandedness, I think Section 31 would have something up their sleeve.