Rareware
Chain Chomp
Bandai Namco also worked on Smash. Mario Kart 8, Mario Kart Tour, Go Vacation. Pokken Tournament and New Pokemon Snap for Nintendo so, they definitely aren't that weird of a partner for Nintendo. The largest reason they were originally selected for Prime 4 in the first place was the size of their workforce, including their overseas studios
I am aware of what they’ve worked on and how great of a partner they are. Just saying it would be a bit weird they didn’t like what there were doing with Prime 4, took them off of it, and then contracted them to remaster Prime 2 & 3 instead.
I’m also all for it being Kid Icarus or Eternal Darkness. Idk if Nintendo has any say in Baten Kaitos, but I do recall the trademark for that having been renewed not that long ago.