https://www.polygon.com/e3/2018/6/13/17460856/nintendo-metroid-prime-4-not-at-e3

Nintendo spent much of its E3 presentation this year highlighting anticipated titles, like Super Smash Bros. Ultimate, and Pokémon: Let’s Go, Pikachu! and Let’s Go, Eevee! But many fans expressed disappointment that Metroid Prime 4, which was announced with the briefest of teases during E3 2017, was nowhere to be found.

It’s probably not too surprising, but the game seems to be quite a ways out, and Nintendo aims to only show things that are a little closer to release, said Nintendo of America president and COO Reggie Fils-Aime.