First of all, history shows polls and Boon's tweets mean absolutely jack squat.
Secondly, I don't think it's fair to say the "No more bats" philosophy is unjustified. From my experience many have a sound reason rooted in variety both in terms of gameplay and general representation. The DCU is vast and has a lot of mythology and the fact is about a quarter of the roster represents a very specific corner of it. In addition we already have several martial arts experts and a weapons/firearms expert. It's the same reason people don't like the idea of Power Girl in game and didn't like the idea of Batgirl and Zod. Skill sets/superpowers are already represented and regardless of the ultimate execution actually delivering, people are skeptical about how it'll happen.
As an aside, with some tweaks, Batgirl could have easily been Black Canary.
Anyway, I totally understand the desire to have your fave character in but somebody earlier mentioned compromise. Red Hood fans can compromise too and that's why I don't understand the staunch aversion to the possibility of him being a Deathstroke skin. Yes, the two don't have any real relation but you guys would get a martial arts expert that looks like Red Hood, using the guns he is so often seen carrying on comic covers. You guys get your character and there's still an open slot for somebody that brings something different to the table.
All I know is the John Stewart fans are happy that he's in the game at all it seems. Better to have Red Hood in some capacity then not at all.