I don't care if the game has realistic graphics or not, I just want it to be a quality game that Nintendo puts a lot of creative effort and pride into developing and that they really try to reinvigorate the franchise. I would take mediocre graphics any day if Nintendo delivers something that is truly unique and creative. I don't want MP4 to be a game that Nintendo developed just because their fans had a hissy fit over Metroid Prime Federation Force three E3's ago. I am afraid that MP4 is going to be another Star Fox Zero, a cop-out game that Nintendo releases to fulfill an obligation to their fans that is basically a piece of garbage. The reason why I am worried this might happen is that Metroid Prime 1 (easily one of the top ten greatest games ever created) only sold about a million copies, so I really don't know what financial reasons Nintendo has to invest a lot into MP4. My hope is that the new MP can really re-invent the franchise and bring in a lot of new fans.

The way I see it, MP4 can be either like Star Fox Zero (a crappy game that could very well be the last entry in its franchise) or like Fire Emblem Awakening (a great game that carves out new territory for the franchise, garners mainstream appeal and leads to many more entries).

Realistic is a broad range that Prime and OM fall in they're just a stylised realistic approach after all the OP lists Doom as such a game and it is just as stylise, don't mistake photo realism as the only realistic.

I mean if we're talking hyper realism, then no because that doesn't work as well with its fantasy sci-fi settings and creatures. But yes, it will probably be the most realistic looking Nintendo IP to date. A current gen update of how MP3 looked I'd say.

Yeah, people need to define their terms.  There aren't just two styles, Wind Waker and Last of Us.  It's a broad range.  Mertroid Prime 1 to 3 are on the realistic end, above, say, Xenoblade 2 but below Metroid Other M.  And Other M is a bit below your Call of Duty games.  

I think Pikmin (environment wise) is the closest thing to photorealism we'll ever get from Nintendo. Thanks to you, I'm now wondering how Pikmin 4 will look like.

Yeah, I was already impressed by how Pikmin looked on Wii U, I could almost eat those fruits XD

Since realistic means everything is brownish grey, I really hope it’s not.

No. It's just plain impossible on the Switch, imo.

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You do know that the majority of the PS360s libraries had a realistic art style of some description and the Switch outmatches both of those handily, right?

This is how I feel overall I just wish/hope Nintendo take a leap of faith and build on the franchise. It has so much potential to be a broader audience game. It should be one of their Tier 1 games not Tier 2  as it is atm.