Seriously, what is your problem OP?
We have a PERFECT working system here, with a crypto currency everyone trusts, buys, sells and is integrated in million of places? Why do people keep bringing up big tech companies, governments and all these "brands" as if only their stamp of approval would make Bitcoin work better?
Bitcoin is backed by MATH, there is nothing more sane and sound than that.
We do need corporate backing to help us over the precipice of widespread acceptance versus the death of mainstream Bitcoin usage, ie only geeks like you and me are left using it.
Op, they don't need to create their own coin to make cryptocurrency viable. They could simply endorse Bitcoin. Providing companies their ad revenue in Bitcoins and charging in Bitcoins would be a fantastic way to get businesses involved in the currency, which would have the knock-on effect of increasing the likelihood of supply chain exchange of Bitcoin (which would have huge positive feedback implications).