there are enough hints scattered throughout the teaser to say that this is a new game and not a port. the overall style was changed drastically from the Wii U / 3DS reveals, whereas before every character reveal had a unique splash screen, while the Inklings were just there. there are also a few changes to the logo, with the cross now cutting between the letters, and smash ball in place of the 'O' is now a perfect circle, whereas before it was slanted to the right. not to mention Link's outfit has been updated to resemble his Breath of the Wild appearance, which would be going a little far for just a port.
that being said i can imagine a lot of Smash 4's content returning in Smash 5. a lot of the stages were amazing and many of the 3DS stages would look amazing in full HD. as for new content, i dont need much to satisfy. I just want Ice Climbers to return, maybe some new better costumes, and one or two new game modes would be enough for me.







