Metroid Prime 4 is unlikely to come out until 2019
That's a long way away
Well this isn't the greatest news. If you've got a yearning for Metroid Prime 4 on Switch, then it looks like it's going to be a while before it's sated.
In a document sent to the press after a recent earnings call, the game's release date was listed as TBA. Considering other games on the document had release dates in 2018, it's not looking promising for Metroid Prime 4.
Still, what's another year when we've been waiting since 2007 for the latest addition to the Metroid Prime universe? I'll let you answer that question in the comments. Please don't swear too much.
Gamespot