Please do your research before stating a "rumor."
What "rumor"? Everything I've read says they haven't decided yet.
EDIT TO ADD: here's a good summary list for Z9 owners (note that it is not maintained by a dev, just a user):
https://www.reddit.com/r/zec/comments/8h14ms/equihash_antiasic_fork_every_equihash_coin_and/
You are NOT reading comments. The statement was about ZEN Cash. NOT ZCash.
I'll quote Z E N "Co-Founder" once again:
whats the TLDR version?
Thanks.
Modifying ZenCash to use Equihash-144-5 is doable, and the software development team has started identifying the specific work that would need to be done in order to create and test this change. It would be a Hard Fork change, and for optimal success of the Hard Fork, it would be best to implement such a proposed change as quickly as reasonably possible before too many ASIC miners take over the hashrate of ZenCash.