The dlc has covered lot of gamers already I mean Steve getting in The guy from highest selling game in the world has definitely covered the most IMO I mean all that's left is indie gamers (shovel knight as a assist trophy doesn't count) Like maybe knight from hollow knight (the main character is not actually hollow knight hollow knight is the villain of the story I mean gameplaywise we could delve deep into the lore but I'm not today)
The Knight would be so damn good for Smash, his moveset would translate pretty well i'd say.
Zelda - has representation with it's core 3, wouldn't say no to seeing the Champions though.I didn't have an N64 or PS2 growing up so I did miss out on a lot of those 90s games
and minecraft has never ever appealed to me, just not my kind of game
some reps that I would be over the moon with:
Fe (this is a niche one but it would work so well)
spyro, maybe, depending on their kit
another pokemon? This one would probably leave people upset as much as byleth did but smash bros has not yet acknowledged PMD as a series
where's my grovyle? Where? Where's all the fire music from the PMD series? sakurai pls
Shovel Knight - exists as trophies it might work though just because of the movesets.
Dark Souls - would be a hard no, the whole point of that series is the player (i.e a creation of you) goes through n links the flame, only way it'd work is skins for Mii such as artorias' armor or some such due to it's customizability, and no having the bosses as characters wouldn't work well.
FE - Not sure what this is but if it's Fire Emblem hell no that crud has oversaturated it has likely got the most representation in the series.
Splatoon - we've already got representation of via Inkling, so i'm not sure what else could be good from it.
Spyro - might be a good but as you say is dependant on kit, possibly on which spyro game they take the smash form from, cuz spyro has a few abilities
Pokemon - i wouldn't mind if they removed lucario and swapped with something else, or maybe give us a reskin of pokemon trainer so the starters they use are different gens.
Honestly for smash my only true desire is remove so many goddamn clones.