Almost all of these Nintendo-related things seem plausible, but it's a bit too many games at once. This feels like a typical fake rumour.

It looks too good to be true.

I saw the list when it was first posted and I don't think it was edited. I've seen a lot of people say that, but I really don't recall it being at all. Flowtron, by the way, leaked the roster for last year's Street Fighter season, and was accurate with this year's (only he said Sakura, Blanka, Sagat, Mayor (Cody), President (G) and Waifu (Falke)". So presumably, Cody takes over as mayor in Metro City, if he doesn't, then Flowtron was just as inaccurate as this guy's first list.

As for what people claim he got wrong:

DMC5 at PSX
SC6 for Nintendo Switch
Four additional characters for SF5 AE that aren't part of Season 3 (Oro, Viper, Necro and Q), though he's adamant that they're still coming some time this year. He's said that they'll be released as regular DLC for AE purchasers, but as a free addon for anyone who owns the original SF5 as a thank you for supporting the game right out of the gate.

We can't really know about the SF5 AE stuff yet, but he's adamant it's going to happen this year. SC6 Switch and DMC5 obviously didn't happen, but like you said, announcements could very well just have been delayed.

None of the Switch stuff seems too far fetched really for the most part, but I find this hard to believe simply because how would this one person apparently have so many sources to know about stuff from so many different companies?

And some of this stuff seems random, like why would Nier:Automata be a game that Nintendo, according to this person, 'really wants ported to the Switch'.

In terms of some of the apparent 'leaks' though:

- I think a Wonderful 101 port will happen since Kamiya tweeted a picture of those characters holding Joy-cons not too long ago and the fact that Bayonetta 1 + 2 are being ported.

- GTAV and Read Dead Redemption are possible and I could see it happening since Rockstar seems on board with the Switch for now after releasing LA Noire on it, though perhaps it depends on how that sold.

- I could also see Fortnite coming to the system simply because the devs might see the Switch as a console where they can profit off of being the only battle royale type game on it for a while (assuming that PUBG ever comes to Switch).

- Hearthstone I think was hinted at before for Switch as well so that wouldn't surprise me. 

Again none of the Switch stuff seems too far fetched to happen, I just doubt this is real cause how would one person have so much info on all this different stuff. Reads like someone just threw together a wishlist sort of. 

If this stuff does turn out to be true though that's a damn good amount of big games coming to the system.

I don't think they need insiders at many different companies. Just insiders at Nintendo. They likely know about many third party games coming to Switch this year. 

Ah ok yeah, I guess that would make more sense. 

So why would Nintendo port Wonderfull 101??? This list is incredibly fake.

CoD part could be true. Treyarch are developing the new CoD and they had BO2 and BO1 on a Nintendo system.

Red Dead Redemption is probably not going to happen. When wondering about the lack of PC version, people always talk about the game's development woes, which make porting the game difficult. I don't know how troubled the game's development was in reality, but that's what I always hear. Anyway, my point is that if a PC version hasn't happened yet, a Switch version isn't likely either - unless the game's getting ported to PC as well.

Hah yeah, gotta take it with a grain of salt, but the dude's been right more than he's been wrong so far.

As for Goku and Vegeta, that's what a lot of people have been saying lately, that it could be UI instead. I'm not caught up with Super so I don't know, haha.