I thought they had defunct. How does a game company not release a game in 6 years and still pay wages?
I don't know, ask Bend Studios, they went 7 years without making a game after making a card game (which wasn't even entirely made by them but co-developed), and 8 years without making an actual game. Or the team behind The Last Guardian, a game that started in 2007 and didn't release until 2016, breaks in-between to be kept in-mind. Or Sucker Punch studios, which was super productive in 2014 and didn't release another game till 2020, almost 6 years later. Or even Santa Monica, which took 5 years just to make another God of War game (after Sony almost rejected their proposal, mind you).
At least Retro made their own port and didn't start on Metroid Prime 4's development until late 2018/early 2019. I have no idea what the excuse for those companies would be when they only worked on one game for that entire length, whereas at least Retro has presumably worked on Metroid Prime 4, a port, and a most-likely now cancelled game project, in those 6 years.