This is true. New Pokemon, Splatoon 3, exclusive Mario + Rabbids - that's a heavy hitting line-up. The narrative that Dring is tapping into comes from Zelda being the Online Hype Machine (and sure, the new one will be an enormous hit). All that being said...
... I personally don't think it's impossible that Nintendo planned to promote Zelda at E3 and that E3 being cancelled led them to change their plans. That doesn't mean they went "oh no, we have nothing!"; more that, without E3 to tie it to, they pushed back promotion for Zelda and are splitting up the rest of the news they wanted to deliver because they no longer have to stick to the E3 schedule.