FFVII Trilogy for Switch2 is as obvious as a Mario game: Those games have to make some good money, once and for all, and Switch 2 IS the platform, and will be the platform were the trilogy will sell more. I expect a pack with all the trilogy after the third appears, and the Switch 2 edition will be succesful as F*.

What I did not expected was the Halo series... And if it's true, it is AWESOME.

Halo MCC might be close to 10 million as is, but it's hard to say.

FF7 isn't doing better on Switch than on Playstation. Manage your expectations. May not even sell half as well.

I think MS totally forgot about Rare Replay

I think FF7 Remake for Switch could do pretty well as there's likely no new Zelda game in the launch window and that sorta is one of those games that could fill the void a bit. Elden Ring is possibly another though we have no word on that.

If the Halo Collection comes to the Switch 2, then Master Chief is definitely in the next Smash Bros.

Yep. Can see Tifa from FF7 also.

I should rephrase, I think 10M+ units sold on PS5 and Switch 2 is possible. 

Sure. But 1M should be enough

Probably not. But it'll sell well enough to be considered a success. Especially if it leads to a resurgence in Japan. Where the series has infamously been declining since the PS1 era just because dedicated home consoles in general have declined significantly over there.