No, it's definitely after. The main character of Riftrunner is a follower of the order set up by the Divine One (Your character in Divinity).
I know this thread is pretty old already, but I'm just restarting <img src="/ubbthreads/images/graemlins/div.gif" alt="" /> after a LONG hiatus (having to wait ages for the path rather put me off the game back then), and I must say Riftrunner sounds interesting. Now I only hope they'll be careful to stay gender-neutral when referring to the Divine One in the new game, since it would REALLY annoy me to have my character referred to as male. <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />