We're working to run the Return to Ravnica massdrop soon. Based on our initial talks with our distributors, it'll most likely be run at a better price than the last buy for Avacyn Restored.
As for the other products in the poll, we wanted to run Innistrad first, however we're told that Wizards is currently in the process of printing another batch. As a result the pricing wouldn't be as good as if we wait an extra few weeks and availability wouldn't be enough to handle such a large group. Gatecrash is also in our pipeline, however a little further down.
We'll definitely keep you updated as we get more information and get closer to the massdrop launch date.