I feel like I'm the only person that doesn't want a Smash 4 port for the switch. I would be too afraid of Nintendo making it the only Smash game for the switch, essentially robbing us of a new installment.
Meanwhile, I feel like I'm the only person who's kept tabs on Bandai-Namco's "Smash 6" job-
listing and other information about major Switch releases that commenced development at the same time and were made from the ground up during that timeframe (
Super Mario Odyssey,
Mario + Rabbids Kingdom Battle, and, a year later, only getting two years in development,
Splatoon 2), and doesn't quite get why so many people think it'll be a no-frills port.
That job-listing went live in April of 2014 - before Smash 3DS/Wii U were finished - and it doesn't take a 200-strong first-party team just shy of three-and-a-half years at the time of writing to make a no-frills port of a game whose engine was self-evidently designed for easy scalability. My feeling at this point is that the engine was re-used, but looking at Super Mario Odyssey, Mario + Rabbids Kingdom Battle, and Splatoon 2, I can't imagine it being a no-frills port of the previous title.
As far as I know, the only sources claiming that it'd be a no-frills port were the same group that claimed that Splatoon The Enhanced Port Definitely Not A Sequel was a launch-day pack-in with a second Switch SKU that had more storage-space on-board, that the Switch would only come in grey at launch and white later, that The Legend of Zelda: Breath of the Wild had been delayed until late summer with what was later named as Super Mario Odyssey being the big launch-day title, and that Mario Kart 8 Deluxe would have new cups. If I'm remembering correctly, one of this group also claimed that Shovel Knight was the winner of the Smash Ballot, and that he would be the first of multiple ballot-pick DLC items.