Ashley I have written the people I know at Nintendo to see about looking further into Construct 2. I mentioned that Super Ubi Land is created in this engine and would hope to see that Scirra gets to create an export for the Wii U.
The process was pretty easy over all to be a Nintendo developer but the biggest and possibly the hardest part is actually having a title released on one of the big 3 consoles. I had created the characters for the Sims 3 Pets (PS3/360), I own Notion Games, LLC, and have released a game on the iOS (Up Up Ubi). So I was accepted pretty quick. Nintendo has given Notion Games the reigns to create as many games as we'd like for their console.
You do have to pay for a dev kit. So bare that in mind as well. But generally, if you have all of those things, you're set. If you don't, start somewhere. Create an LLC or some sort of company (they're not that expensive to start at all) and start creating. Build a library and keep applying. They're trying to maintain a certain level of quality and just opening up the doors to any and all indie devs will flood their market... we already know how that is with the app store.
My next game, Team Notion the Game, will be put into production later this year and I will be looking for an artist or two to help me out with the game. That should help out a couple people be able to have a title under their belt that will be released on a major console. PM me if you are interested.