I'm sure it'd be earlier than that too. But I chose that date because it cannot be
later than that date, and so March 8th, 2020 was the day we were guaranteed to be past that midpoint (short of it being delayed past June).
Hopefully Game Freak can do that. However, Japan's business infrastructure isn't built for working from home. Despite there being lots of office work in Japan,
80% of people working in Japan have no way to work from home, and the government agency set up to equip companies to do just that is overwhelmed and incredibly backed up. The result is that the streets and public transportation of urban Japan are still completely packed, at odds with most other countries.
Nintendo is a company with its ear to the world as a whole though, and they may be able to do that for Game Freak. Masahiro Sakurai (creator of Kirby and Super Smash Bros.) is currently working from home, though he does point out that
working from home goes against the Japanese work ethic.