Retro Studios has updated the official Metroid website today to inform visitors about the upcoming Metroid Prime 4 which is due to be released next year on the Nintendo Switch family of systems. That’s not the only game added to the site as the Nintendo Switch Online + Expansion Pack version of the excellent Metroid Zero Mission is also mentioned. Now all we need is an announcement for Metroid Prime 2 and Metroid Prime 3 on Nintendo Switch.