I would love something voiced like a Pearly Gates with more output, and a little more bass for the bridge position. Basically a custom custom with more bass. I'd be willing to try A8 with rails though.
What I would like in a bridge humbucker is a tapped/splittable pickup; like I said in the poll. Untapped it would be basically a Custom Custom. Tapped, it would be an Alnico II Pro. When you split it untapped it would be a JD. Tapped Split, it would be an APTL-1. That pickup would do so much that Seymour would be partnered with Line 6 making the first "Modeling Pickup".
Seriously, that tapped humbucker thing is what I would like.