Haven't heard anything yet on a price point, I haven't heard whether or not they're charging for it - although it wouldn't surprise me. Nor do we have any indication of what's included with the purchase, short of the new class itself.
I don't mind them charging for it, it's a lot of effort to program a new class, create tons of art assets for it, test it, balance it, and then patch it into the existing game. This is someone's job, I don't know why some people's assholes tighten at the prospect of new content to a game costing money.
This is someone's job, I don't expect you to work for free, why should others be expected to do it.