No way in hell. Nintendo would have to try to fuck up for it to be an outright disaster. It may not sell as well as the first Switch (which would be difficult in any case just due to how well the Switch sold), but I can't see Nintendo failing unless they pull the Wii U, and try to force a lame gimmick, while abandoning what made the Switch great, and not releasing any real games, and giving the console confusing marketing. Nintendo did all that once, but its impossible for me to see them doing that twice.