A few people in here are expecting or hoping for a Metroid Prime 4 teaser. That...isn't likely. I'm guessing that as recently as September Nintendo were still going full steam ahead with the other development team(s). I'm thinking it's likely that Retro didn't take over until December and this was probably prompted by the team not able to get the Metroid reveal ready for the Game Awards. I just can't imagine that Nintendo or Retro would want to tease us this early into development. At this point they know we're not expecting anything and that the game probably is 2-3 years away. I'm thinking at the earliest we'll see a Prime teaser at E3 2020. I could also see them waiting until E3 2021 with a release date for Aug-Dec of 2021. They got burned showing this title (card) so early and they likely don't want to do that again...ever.
But...I would expect to see Retro's title that they just likely finished working on. That's if it wasn't canned/scrapped.
I don’t think anyone is seriously expecting MP4 this year, I certainly haven’t seen anyone saying such