Nintendo of America president Doug Bowser had the following to say about the event…
“Fans of all ages can currently experience the unique games, characters and worlds of Nintendo on Nintendo Switch, but we want to expand that scope with a new experience. With Nintendo Live 2023, we’re giving attendees a chance to celebrate together with family, friends and the broader Nintendo community in the spirit of fun and creating long-lasting memories.”
IIRC Nintendo announced the Switch in September,2016 in a Direct-commercial.
So, possibly a Direct-commercial in early September and a hands-on event with new hardware a week or two later?