Theyre getting dlc purely from what they read from fans. It's not based on a vote (note that unlike Smash, Sony doesn't own a lot of the characters you see as "playstation characters"- they're third party, so voting would be limited to some degree)
Second, they're reading what the fans want, and are doing what they can to get at least many of the dlc characters in. So, yes, they're technically getting the DLC characters purely fromo the fans
Would be hard to do because Sony doesn't own the rights to every character. What they could do is provide the fans with a poll of the character that they have obtained a license for- or could easily obtain- and let them vote on that.
I hope they go with their best judgement over gathering votes, because what is the only people signing up to vote only vote for sucky characters
16 Characters that should really be in Playstation All-Stars Battle Royale: Hero-Patapon3, Blob-LocoRoco, Abe-Abe's Oddessy, Ari+Stan-Okage, Raziel-Soul Reaver, The King of All Cosmos-Katamari, Alex Mercer-Prototype, Isaac Clarke-Dead Space, Cloud-Final Fantasy VII, Spyro-Spyro, Crash-Crash Bandicoot, Tiki Guy-PixelJunk Monsters, Amaterasu-Ōkami, Mega Man-Mega Man X8, Ratonhnhaké:ton-Assassin's Creed III, Kevin Butler+Marcus PSP
^^^THIS LINK BELOW EXPLAINS WHY THEY SHOULD BE ADDED IN. vvv http://community.us.playstation.com/t5/PlayStation-All-Stars-Battle/15-MORE-THAN-DESERVING-NEW-CHARACTER-IDEAS-feedback-is/m-p/39129075#U39129075