More news coming out is that the development was in different countries (lines up with what we heard about this game being developed by Bandai Namco Singapore and Bandai Namco Japan) and they couldn't get on the same page.
Retro apparently devloped a demo on their own and pitched it to Nintendo to take over and restart the project and Nintendo approved.
That tells me if they were willing to make a pitch that the game they we're working on priro (Star Fox GP supposedly) is nearly finished and will release soon
Bandai Namco made that piece of shyt Fast and Furious Crossroads, they probably had Metroid looking like straight garbage.
Bandai Namco: ...and here it is, METROID PRIME 4!
Miyamoto: nikkasuke, what the fukk is this shyt?
Bandai Namco: Metroid Prime 4 my nikkazaki
Miyamoto: Yo, this is dog shyt. Have you ever seen us make a Metroid that looked like this before?
Bandai Namco: Bruhzaki, I think you're being a bit harsh.
Miyamoto: Y'all off the project, we're scrapping this shyt...we're giving this back to Retro...I don't give a fukk if we have to delay this bytch 4 more years.