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I don’t speak for Zcash Co., but the definitive answer to your question is no, there will be no fork for ASIC resistance.
There will likely be a fork in late 2020 or early 2021 to change the algorithm to a more power efficient PoW algorithm (not ASIC resistant, but would still brick current Equihash ASICs). Zooko has also indicated that a switch to PoS is also possible once Ethereum has successfully migrated to Casper, but that’s far from certain.