Based on our guess, here is what might happen
- Some miners will leave mining bitcoin as they see their mining profit sinks (if bitcoin price doesnt appreciate to make up the difference)
- This would cause the hashrate to decrease in a higher mining difficulty, Bitcoin network would temporarily be disrupted
- Miners may either leave and sell their SHA256 operations to another profitable bitcoin miner, maintaining network hashrate
- Or they may start to profit switch among SHA-256 coins, this is a function of Bitcoin Cash and BSV price and liquidity

In any case we are eager to know more too, and thats why we are inviting folks from Poolin and Slush to share their thoughts within the mining space post-halving at http://coingecko.com/meetup