Alzrius, no checks (unless you're interested in writing one of the adventures), but I promise you'll be listed in the acknowledgments of every adventure.
Catsclaw, I would definitely consider a subscription option, though I don't know if it'll be viable in the new pdf OneBookShelf store. But I'll ask Russ to look into it. We certainly won't object to people paying us in advance.
Wik, of all the critiques I received from folks I showed the campaign saga outline to (and we're officially using the term "campaign saga"), a concern for the setting not fitting into everyone's game was the most common one (after 'be careful not to railroad' and 'be sure to make the psionics optional'), so believe me when I say we're making sure that you can slot the saga into another setting without too much trouble. We obviously can't officially say where to place it in the Forgotten Realms or Eberron, but we might casually offer such suggestions in forum posts.
As for size and price, we're still figuring those out, though I imagine they'll be roughly like the length of Dungeon AP adventures. I'm working on the first adventure, and when we go into layout we'll have a better sense of what we want to charge. We're also planning to offer associated mini-products that can add more depth and breadth to the saga, like small monster books that go into more detail on the new critters, but we would probably need to find extra writers to help with that.
And of course I named the emperor after Dranko. He's one of my heroes.
We're going to have to keep some things secret, but if anyone else has questions, feel free to ask.