Seems like people are glazing over things because they fear F2Pities, which is fine, because that shit can suck.
But it's obvious they are moving towards a standard KI-seasonal system - characters rotate in and out for free, you can buy them in packs or separately, but both equate to the same price (IIRC).
It's possible SFV comes out at a straight 60 with the twenty something characters as a standard, a bunch of modes like Ultra, and whatever, and THEN they start working on a DLC plan to support the game.
Capcom's had some shady history, but with Sony plunking in some money I doubt they'll allow a F2P system that completely screws over consumers for people with money.
Also, they aren't going to start throwing buffs for people with money. This game is turning out to be more balanced than a few other SF games so far, no way they'd ruin it with BUY SOME FIREBALL PLUS TEN DAMAGE effects. They admitted SFxT was a terrible way of doing things, and since most tournies (my locals, at the very least) turned that shit off, it wasn't that viable.
In short, DLC routes aren't always standard, so chill.
You also have to realize that Capcom don't have the luxury of giving out characters for free. Capcom is arguably one of the best if not the best company that makes fighting games out there and but that comes at a cost. The animation quality of SF5 is superb and I very much doubt they can sustain the development costs of new characters by simply selling cosmetic items.
It's not only Capcom at the money front though. It's Sony as well. That's why I think it'll be seasonal updates ala KI because it won't gate out players, it's a proven effective method, and if you wanna buy all the new dudes, the cost is cheaper. DOA5 and KI are making bank on that, and it's smart.