I'm going the deliver my usual balanced view over this debate.
Now, we know that not every company will be able to get a playable character in here, since development time is not infinite. While spirit deconfirmation is irrelevant in regards to base game content, I still think that the current pass will have a balance of totally unrepresented series and promotions (whether it's at least two or so). So far, companies that seemingly weren't able (or didn't choose to) to have playable content for some specific series via DLC have settled for sprit events instead, and even then we haven't got any new ones of those in a good while. And it's still ambiguous whether even
that is an obstacle.
Also,
's case has showed us that key figures can hide the truth really, really well if they're willing to cover up the true extent of their involvement with Smash until the time comes. No pressure from fans will break that kind of a poker face.