So far I've seen the Singapore studio credited on semi-recent titles produced by Bandai Namco's main Tokyo development studio, like Tekken 7 and Tales of Berseria. I don't know if they've run a project themselves (yet) or if that's necessarily even what the studio was created for.
I really don't have a good feeling for Metroid Prime 4. If it was just another new Metroid, sure, give it to Namco, whatever, but when you specifically call it Metroid Prime 4 there's a pretty distinct direction, art, and design you've set an expectation for, and to have production move not only to a different studio but all the way across the ocean, I dunno. I just have a feeling it's going to be either a really, really paint by the numbers producer driven experience or something that is very, very different.