I pity the poor souls who won't get Roy via DLC when Wii U's Wi-Fi connection is eventually shut down and they bought SSB4 far too late.
Why make DLC when they could have just made SSB5 instead?
(
best Toad chance bro. No, not that.)
While I don't speak for everyone a few additional characters scattered throughout SSB4's many many years prior to the creation of Smash 5 will renew interest in the game for longer amongst less hardcore Smash fans. It also keeps the game getting new updates; balance patches and the like most likely done for free with the additional cast there to keep Sakurai's team in work.
One of the few problems I do have with Smash is the sheer amount of time you have to wait between games(roughly one per console, with some consoles having more longevity than others). I'm not expecting a new version every single year like Street Fighter used to enjoy doing(dunno if it still does) but this seems like a reasonable way to include optional newcomers...
One of my favourite games to do meaty DLC was Borderlands 2 and the additional campaigns and characters are all nicely polished, updated and patched regularly.
If Sakurai is worried he won't have time to bring back everyone, this seems like the most logical route in this day and age which can also generate income.
Obviously on disc DLC is right off, but I don't see how an optional Melee pack would hurt too many people, since chances are they'd waste that same disposable income on games they will barely touch.
I know I have. Damn you Steam Sales! Even if a whole game is £2, it's not worth it if I only play Team Fortress 2; a free to play game at this point.