Vitalik's suggestion that Eth merge with Bitcoin Cash is not helping with clarity either.
But will this merger be just marketing related or will the blockchains be merged?
Neither. My understanding is that running Ethereum on the Bitcoin Cash blockchain network is a short term bandaid to handle scaling to give more time to Vitalik and the team to come up with a true solution. If I understand that right (and that's a big if) then seems to me that this would dilute the brand at a very risky time and confuse an already cloudy space. I don't think it would be good for price, and since it is stated as a short term fix I don't think it would be good for the Ethereum network in general. There is also always the danger that this short term fix could become permanent, as they so often do and the long term scaling issue never truly goes away.
lol, may be you're thinking it can crash the price but remember the ecosystem system we're in if full of people who're in for the money, and then the tech comes second. Should the merger be true, both coins can skyrocket probably in the near term, just that the future will however be skeptical and will as usual depend on one thing- the survival of Bitcoin (which is the survival of cryptoverse).
Secondly, we should look at the benefits of it making ETH/BCH scalable. If that could work, then i think it is a good move.