I'm not opposed to race splat books per se, but...
Elves, Dwarves, Drow?
Been there, done that.
Let's see Grugach. Let's see Orcs/Half-Orcs. Let's see a good treatment of Gnomes (the 2e gnome/halfling book really sucked), let's see a good Halfling book. Hell, with the renewed popularity of Halflings in 3e, and certain halfling like characters in this really popular movie yall might have seen, you would think a Halfling book would be a huge cash cow right now.
So, basically, yeah, race splatbooks are cool, but I'm hoping to see some variety and a little more cutting edge topics.
Green Ronin's track record so far is excellent as far as I'm concerned, so they might very well fall into my "this idea isnt too cool at first glance, but these guys might impress me so I'll buy it" category. Kudos to Chris and co.
Haven't seen anything by paradigm first hand yet, so I'll withhold judgement.