I'm convinced that half the people posting in here are account farmers; The amount of low quality posts is astounding. Some Chinese website posted some speculation and now idiots are already talking about forks and the death of Ethereum.
Anyone who thinks Bitmain is going to (publicly) release an Eth Miner needs a reality check. Read the 3rd paragraph in the Mining Centralization section of the Ethereum whitepaper:
https://github.com/ethereum/wiki/wiki/White-Paper#mining-centralization Specifically the part about poisoning the well.