Unpopular opinion:
Smash 5 should be a reboot of the franchise, taking things back to root, scrapping a lot of what's been built up and starting again to try fresh new ideas (as well as having tighter and more competitive gameplay).
The roster should focus on celebrating gaming history instead of just Nintendo's (though all characters need to have made an appearance on Nintendo consoles). Meaning, a lot of the obscure or less relevant Nintendo characters like Shulk, WiiFit Trainer, or the 12+ FE characters, get the axe, but prominent and iconic 3rd party characters who are pillars of gaming or classic icons like Ryu, Megaman, and Cloud come back.
All characters should have their movesets totally redone redone to try new takes on them.
Just off the top of my head, roster should be something along these lines I'd say:
View attachment 133156
From here on, future installments can further expand on additions from old favorites, but totally redone with brand new movesets just like everyone you see up there^^^^.
Reasoning for this:
-Roster clutter
Too many characters in the roster, and expanding it further just adds more clutter, too many characters with movesets that just don't work, could be done better, or just don't make much sense.
-The gameplay is getting stale
Smash 4 still doesn't capitalize on the potential of the genre. And I don't mean advanced techs like Wavedashing or whatever, but a lot more could be done to make the game both exciting, and accessible imo. Slowing down the gameplay, or further tweaking things from the established formula isn't enough anymore. Even when comparing simple things from Melee, such as the stage variety and such, 4 feels severly lacking in that department, with things being too gimmick heavy, yet having very simple layouts. Stages like Brinstar Depths and Pokefloats have gone totally out the window, despite being some of the more interesting in terms of design.
-What more could you possibly add?
Smash 4 basically pushed the limits in terms of fanservice and what could be added. Plain and simple, nothing more can be done from here to really wow people anymore. Continuing onward with the same routine from here on out will only draw the series stale and really hurt it. Moreover, adding even more content on top of what currently exists, will not only further clutter the game, but also increase the workload exponentially. Starting anew once more gives people a chance to get people excited again to see their favorites return, and expanding the scope of what Smash is, allows for more iconic franchises to get the spotlight, rather than dig deep into the obscure.
I know this is gonna be massively unpopular ITT, so... let the ****storm commence: