All versions will be available in 2020 (FCEV, BEV, PHEV), but same availability as the latter part of 2019. Only parts of CA for the Fuel Cell, CA and OR (with waiting lists) for the BEV, special order (no inventory) outside of CA for the PHEV.
https://www.insideevsforum.com/community/index.php?threads/2020-clarity-is-a-carryover-of-2019.7556/#post-84891 https://www.insideevsforum.com/community/index.php?threads/honda-email-announces-cr-v-hybrid-and-all-3-claritys-for-2020.6960/
looks like there is the hydrogen "Other than the typical hybrid and electric vehicles, a new contender entered the ring. The hydrogen-powered fuel cell is slowly making the rounds through car manufacturers. The 2021 Toyota Mirai, 2020 Honda Clarity, and the 2020 Hyundai Nexo were few of the hydrogen cars available for guests to see on the show floor." https://csulauniversitytimes.com/clean-air-vehicles-usher-in-new-era-in-the-auto-industry/
The Mirai has been around for a few years. It is lease only in CA and includes $15,000 in fuel credit for 3 years, which is a good thing because it costs $5,000/yr to drive it 12,000 miles. About the same as one of those monster diesel pick up trucks. Toyota will provide a loaner car if you need to take a trip outside CA or go where hydrogen isn’t available. The hydrogen is mostly made from fossil fuels too. Sound appealing so far? Our friends have one. Because of the recent hydrogen shortage, Toyota gave them a loaner and will be making their next 6 monthly payments.
https://hondanews.com/en-US/honda-automobiles/releases/release-c6847c8d82ce734c74e2cea13c007317-honda-continues-to-dominate-as-number-one-brand-in-2020-kelley-blue-book-best-buy-awards This link from Honda quote the 2020 honda Clarity recieved recognition for the 3rd year in a row. From an article dated 11/20/19. It listed after the 2020 Odyssey.