Federation Force expansion lel.

I don't think we'll see a new Metroid game announced next year, mainly because I think Nintendo will want to focus on Federation Force next year, but in 2017 I could see them announcing a reboot or a sequel to a mainline Metroid game for NX or whatever new console they have out.

I do think NX is going to be a new platform that basically breaks down the boundaries between handheld and home console, essentially a platform, without one specific type of hardware and for that Nintendo will have a new mainline 3D Mario game as a launch title, along with perhaps a version of Zelda updated for it or with additions that take advantage of the new platform.
Perhaps the new Pikmin will be a cross generation game, that can run on both Wii U and NX ecosystems.

Nintendo would be wise to have something like a Gears or Uncharted/The Last of us and a few other new IPs that target the western 3rd party audience, maybe they can get deals with Ubisoft or another big 3rd party publisher to make some cool new IPs outside of Nintendo's own style of play.

I think if a new Metroid is going to happen then it will be a while until we hear about it, though anything is possible with Nintendo.
Hopefully they'll have a developer make a fully open world, 3D Pokemon action RPG, this kind of a game would push a lot of hardware IMO, especially the handheld portion of the platform, assuming it's a hybrid platform based system.

I'd love to see a 3D Metroid on the NX. I know it's unlikely to see it soon, but my poor little heart can't stop hoping.

As long as Pachter doesn't predict a 3D Metroid announcement for 2016 I'll keep believing!

I hope we will see a metroid game crossgen

Nah, I'd like to be optimistic, but Metroid and optimism just don't go together nowadays.

Nope, more like E3 2017 (announcement of MP4 for the NX).

You said that about this year's E3 too, and if I recall correctly, E3 2014 as well.

Nintendo announced SMTxFE, XCX, Zelda Wii U, and Yarn Yoshi three years before they were ready to be released. Anything's possible. Doesn't mean it's coming out anytime in the near future.

Maybe for the NX, but I don't think so..

All true but that was before this years E3 when I realised that NX actually coming in 2016. and not in 2017. as I thought before this years E3. Now I think after they decided to launch NX next year they moved some Wii U projects to NX, I think Metroid is one of those projects and that will sell announced at E3 in 30h anniversary of Metroid.