It is certainly possible. A lot of rumors say Prime Trilogy HD has been finished for a while and they're sitting on it.
Personally I'm only interested in a new 2.5D Metroid as I already own the Prime Trilogy on Wii and Super on SNES.
Yeah, I don't NEED Prime Trilogy HD at all. I've played all three games in the past year lol
Would I buy an HD port? Absolutely :D
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."