According to information reported on the LinkedIn profiles of the employees of Retro Studios, about half of the team that worked on Metroid Prime 3 on Wii would be currently involved in the development of Metroid Prime 4, the new chapter of the series expected to be released on Nintendo Switch.
There were about 50 members of the main Metroid Prime 3 team, and apparently, 27 of them are currently working on developing the new chapter coming to Switch, at least judging from what is reported in their respective LinkedIn profiles of the developers involved.
As many fans will remember, last January Nintendo announced that the development of Metroid Prime 4 has restarted from scratch with the help of Retro Studios, the historic team behind the main chapters of the series.
In this regard, it should be noted that many of the lead creators of the saga have separated from Retro Studios. Mark Pacini, the lead designer of all three Metroid Prime chapters, left the American software house to finding Armature Studio. Other important members of the company, on the other hand, have moved on to work with Bluepoint Games, the team behind the Shadow of the Colossus remake and the HD collections of Uncharted and Metal Gear Solid.
Since the development of Metroid Prime 4 has restarted from scratch, you will probably still have to be very patient before knowing concrete details about the game launch window. Meanwhile, until last June, Retro Studios has continued to recruit new staff in search of an art director.