I only played the First Lord of Shadows, but I thought it was completely mediocre with no real standouts. Mirror of Fate and 2 looked outright bad in comparison. So yeah, I wouldn't want them anywhere near Metroid, and I doubt it was in any way realistic after the behind-the-scenes mess that happened on Konami's watch.
I also thought Team Ninja was completely mediocre and unworthy of Metroid, and figured Other M was doomed from the get go. I was right on that one!
Interestingly, even guys who worked on the Prime games have proven unable to replicate that success with the Arkham Blackgate game.