It seems MSI, not Corinthians, own the contracts of Tevez and Mascherano and who else, but Abramovich is a major shareholder in them and since he doesn't want them going to someone who could challenge them in the Prem or Europe they're going to mighty West Ham on loan...
After burning their bridges at Corinthians when they no doubt thought they could move to a big club. I bet they're messing us about with Cole so we have no time to bring in a replacement too, but would be better off cashing in than letting his contract run down.
It's getting to the point where it's not a sport any more, it's more like WWE only with a very predictable storyline (Chelsea win).