Honestly, if the additions to Smash Bros. are as minimal as Laura and Source Gaming indicate, I'd really hate for it come out so late in the year. It should just come out a few months after the Switch launchs, in like the summer or something.
Other fighting games do this all the time though. Just combine the 3DS and Wii U content, add all DLC levels and characters, add a couple new characters
shovel knight and squid kids