Looks like Grubb's reference to the Bombcast was from
today, where he said, quote: "I'll say, for a while now, I've been hearing that they would announce something this year. That is-- like-- what does that mean? 'Cause, it's like, they could announce an announcement, right? They could do the thing that they did with the Switch, and it's like, here is a teaser video. And it could be even slighter than that. But they'll start talking about it in some way later this year."
He said this in the middle of what I thought was just haphazard speculation from the hosts about Nintendo Live and Gamescom. But then very curiously, after the above quote, he basically wrapped that segment up by referencing a report,
https://www.startmenu.co.uk/home/report-nintendo-confirm-new-hardware-end-of-august-switch-2, which actually claims that Nintendo will actually announce the console at Gamescom, or at least in that specific timeframe near the end of August.
He didn't specifically endorse the report (and the article itself even says they think the specific idea of announcing at Gamescom is not credible, and that the entire concept of an announcement this year is questionable), but he at least seems to think it's in the same vein as his own "announcement this year" hearsay. I'm keeping my own opinions out of this post for now.
(The other thing I was thinking of was
this, from February. And it turns out I was generously misremembering, at that time he actually said there was a 45% chance of the system launching in late 2023. He seems to have forgotten that though since he's totally onboard with the VGC/Eurogamer reporting "lining up" and making sense.)