Does this really matter that much? Seriously: It is a non-issue. The only significant impact, if true, is that the stuff will not be available for a few more months - but that is going to be true of everything in the DMG. My suggestion is to run an introductory 'campaign' that runs from August til the end of the year to get to know the rules and then reboot in the new year so that people can make PCs with knowledge of the rules and all materials available.
Pretty much my thoughts. Which book you open when you make a character probably has more to do with a combination of popularity (they have feedback data on how many players were rolling evil parties and characters. I am gonna guess it is a minority.) and page count than some anti class X bias.
I know in my game some of the players are planning on going towards Evil which honestly I am wary of because in the past it was just an excuse to be a cock to other players and makes designing adventures a lot harder when you have to give the good and evil characters both viable motivations to do the same thing all the time and create reasons for people who hate each other to keep working together. I let them know it was acceptable but that the in character conflict it would generate would be played out for interesting effect and with an eye to making sure that everyone was having fun. If that means hanging the double-dealing sociopath bard well, better luck next character.