So I'm going to be a bit vague here, but I'll update everyone with the current situation. Switch 2 is in the hands of every major developer interested. Sample production, testing and ramp up of full scale production is happening this year from what I've heard. MoneyDJ reported a while back that it would start in November/December of this year, and that lines up with multiple sources I've been hearing. We are still waiting on a funcle to really give us the details, but it seems like leaks by the end of this year are probably going to happen.
There is some rumblings of a direct happening in 2 or 3 weeks, this will likely happen before TGS. It should be the last focused Switch direct (my speculation).
At Gamescom Nintendo presented behind closed doors Switch 2 information to publishers/developers, they will do the same at TGS and possibly in Brazil in mid October. This presentation wasn't the most secure thing in the world... The reason I can share this? I don't know the sources here, I've heard from so many people on this that I trust, that I don't really need a source. I bring this up because I want to explain why I think there will be an announcement this year for a presentation about "Switch Redacted" next year. It could happen any time after October (I think they will release Mario Wonder first). I don't think Nintendo wants to announce it directly however, which is why I think they will use a venue like TGA, it's so core focused, that the only ones who are watching it that don't know a Switch successor is coming next year, are people who don't care about Nintendo, and exactly the type of market Nintendo would like to reach with such a powerful device.
I also think TGA uniquely has the right timing for this particular announcement, because production will start this year, leaks will happen shortly after, and because they are showing it off at multiple events before the end of this year, the likeliness that it leaks is too high. This is speculation, but expect the real stuff we are actually after, to be early next year.