I'll question it, its outright nonsense. Sounds like its probably from Usmanov's PR team.
I do not believe this story one bit. UAE and Qatari businessmen are rivals. They do not work together normally. Then putting an offer this big is insane. And running to the papers is a nonsense.
I do not believe this story one bit, but unfortunately its done it purpose which is make fans want Kroenke and co to leave, asap.
Many Qatari and UAE businesses are in the same bed now, especially after the ME property business collapsed in 2010.