A few weeks ago, +John Stater posted a notion of making a simplified version of his admirable Blood & Treasure as a foundation to build retroclones based on the work of specific illustrators.
That's an idea scientifically calibrated to pique my imagination, and I started wondering "What would D&D look like if it was based on the work of Heinrich Kley?"
I've been playing with it a bit, and it's synched up with a number of other ideas I've been noodling. Here's a rough outline of how I'm framing things:
Spell-caster (Inventor, Spiritualist, Illusionist)
Right now, I'm building it all on a free-form OSR chasis, but seeing as Stater seems to be making progress on B&T Basic, I may use it when it comes out.