Think on this one people...the second PHB is going to bring us the Primal power source, so the following make a lot of sense:
D: Drow (because millions of Drizzt fanbois have disposable income)
G: Gnome (the Bard returns, and he is still a guh-nome!)
G: Goliath (another big race, very much a cult favorite of 3rd edition and about as Primal as they come as far as flavor.)
H: Half-Orc (the internet outcry is heard, who makes a better barbarian anyway?)
S: Shadar-Kai (this one took me by surprise, but it makes perfect sense, why is there not a shadowy or fey race yet? Lets do both!)
I think I nailed them, do I get a prize?