The real quote was "We’re happy to have had the opportunity to collaborate with Nintendo on the video. While we are not confirming any specific titles at this time, we are pleased to announce our partnership with Nintendo and support of the Switch", they didn't deny or confirm it but considering they have a partnership and showed it in the video it's obvious it'll happen.
I think marketing wise with the coming release of Skyrim Remastered they won't want people waiting to buy it for the Nintendo Switch so by not confirming it as a title for the console more people will purchase it for x-box / playstation and then for the NS as well at release.
Nintendo isn't dumb enough to show off a title they don't even plan on having for the console.