https://cointelegraph.com/news/ethereum-announces-metropolis-hard-fork-coming-late-september
How will it impact Ethereum pricing?
will price fall harder or we can see next ATH?
This is not the same kind of fork as before. The previous one was intended to roll back the blockchain to "undo" the DAO hack, while this one is kind of a mandatory upgrade of the protocol to support new features.
It is a positive change, and chain is not splitting. See it as an upgrade, not a fork.