Where is Duke Nukem Forever 2? I want to vote for that as to which one will release first...

FF VIIR will probably come out first since there's actual gameplay footage and restarting development with MP4 is a massive setback ...

You mean FFVIIR part 1? Part 2? Part 3 or the full game?

I feel Metroid Prime 4 is coming holiday 2020 or spring 2021...so that.

I imagine that the remake will be out in full force first before MP4 whether split into parts or released altogether if plans had changed ... 

FF VIIR is pretty far into development by now since it was last 3 years ago when we've seen footage. By now SE probably has the world/level design and the mechanics down already. They'll probably make a couple of modifications near the end such as using ray tracing on the next gen console ... 

2020 just isn't possible with how early in development it is.

I don't think Prime 4 will be a next gen game. Based on where that tweet suggests development is at, and how long these games typically take, I'm thinking more Fall 2022, with Switch 2 coming Holiday 2023 or Spring 2024. It could end up being cross-platform, but probably not at first. Possibly if the Switch 2 is VR capable on PS4's level, that would provide an excuse to make a Prime 4 VR edition for Switch 2. As others have said, FFVII is episodic, so the entire game will most definitely not come to PS4, if PS5 launches in 2020 as expected. That's honestly probably what's taken it so long, is being redone for the PS5. Given that, probably none of it will come to PS4. If they rush it to launch with PS5, I could see the first few episodes releasing before Prime 4, but not the whole game. If they don't rush it to be a launch title, they'll be lucky to get even an episode or two out before Prime. If they change their mind and don't make it episodic, Prime 4 wins completely.

Why are so many people saying Metroid? We will see FF7 this year, but we won't see metroid until around 2021 most likely.

You do realize that Square Enix confirmed it was going to be an episodic release, right? It's not going to be a full game like the original, they said it themselves:

https://www.gamespot.com/articles/final-fantasy-7-remake-will-be-multiple-full-sized/1100-6438387/

Yes I do realize that. But they also had a gameplay trailer of the game months before that of a build that was canned and they restarted development pretty much completely. The gaming industry in general has proven that episodic releases which were once big are quite often a disaster and there is only one series I can think of that still pulls it off (A Square Enix series, but they also had bad luck with Hitman so). I just do not see them sticking with an episodic release system.