Do you mind my asking what else you think they might announce for this year?
I think we will see BotW2, but it won't be releasing this year. And all the other big games we know about (Metroid 4, Bayonetta 3, Donkey Kong rumor) likely wouldn't get their big reveal and then get a release date for 5 months later.
I wouldn't think their big holiday title would be the Pokemon remakes considering the general opinion on them is touch and go and they haven't shown anything on them to get people more excited about them.
To be honest, I tend not to speculate on what will be announced out of the blue, since Nintendo is usually unpredictable with it. Like, I guessed that A Mario spinoff would be shown in the February direct, but I didn’t know it would be golf. I wouldn’t have guessed Metroid Prime 4 would be announced in 2017. I usually approach predictions based on what we know exists and whether it’s likely to be shown off, and then think about other announcements more broadly.
Like, I’m fully expecting Pokemon is gonna be the big holiday title. They aren’t going to pit BOTW2 against that beast, it’s absolutely coming 2022. But I do expect BOTW2 to at least get a trailer at E3 since they stated they had more news to share later in the year, and that was 4 months ago. In a similar boat, the absolute best we can expect from Prime 4 is a teaser trailer akin to how much Zelda got in 2019; it had to be restarted in Jan. 2019 but it’s now had 2 years of work put into it, it’s absolutely ready to show even a peek. Also SMTV, that’s almost a given to show up since Atlus hasn’t said anything about a delay yet, and they love to announce delays (Persona 5, coming 2015-16-17-18!)
Rumors are hard to go off of since they’re so often either wrong (remember how everyone and their dog swore Star Fox Racing was a thing?) or just repeated until they’re right (like “a new paper Mario is coming!” or however many years now we’ve been told that the prime trilogy is toooootally coming to switch), but I do think there’s some merit behind Mario and Rabbids 2, DK getting some new game, and a new Kirby game since his last mainline game was 3 years ago.
As far as unannounced stuff goes beyond rumors, I do think we’ll see at least one ‘revival’, like a smaller series getting a new coat of paint or a rerelease package; I dunno, I just feel a lot of Nintendo’s A-Listers have already gotten a shine on Switch - Mario, Kirby, Zelda, Smash, Fire Emblem, Animal Crossing, Mario Kart, Pokemon, Metroid eventually, Paper Mario, etc. - and in year 4 of the lifecycle they might be looking to branch out to some of the smaller series.