BOTW2 seems more likely for next year than Metroid, given they've had to completely restart the latter project. In the absence of any other big teasers, I'm willing to believe Zelda could arrive next year. From the teaser trailer, it looks like a lot of content from the first game could just be recycled for the sequel.
i ****ing hope they recycle the content and just make another great game in quick time. I've never understood why companies make an engine, get everything working, release a game, and then don't release anything for another 8+ years, requiring a complete new engine, but updates etc.
Zelda botw was great. It just needs some tweaks, but not much. I am in no way an expert, but I am sure that creating new lands areas people etc isn't that time consuming now they have the base there.
I pray they do what they did with majoras mask and release essentially botw2 in the next 1/2 years.
however with that said, i remember botw being in development, and that was what 6 years before it finally came.