Format Factory 2.30 Free Download -
Format Factory is a multimedia conversion utility for Windows that converts video, audio and image files between many formats, and can also rip CDs/DVDs, repair damaged files, and compress media. Version 2.30 is an older release; if you specifically need 2.30, be aware of security and compatibility risks vs. using a maintained, up-to-date tool.
The door was never really closed honestly. In the situation Nintendo DO want to simply update the existing Wii U/3DS version they don’t have to contract Sakurai, Namco or anybody else to do so. They can do it themselves. Of course keeping the characters in the game depends on licenses.
This is ONLY in the case they want an updated port. They could do a new Smash Bros but either way a 6th instalment will hit Switch eventually.
It just depends how Nintendo want to do it.