Saw this on their Facebook page yesterday. HPJ Performance (no affiliation) is doing 6 speed (T56) manual conversions for the 2020+ GT500. I'm sure it will be a 50/50 split on the 'WHY?!?' and the 'About damn time!!' crowds. No idea on the pricing, and their website hasn't been updated for it yet.
Acme Trading Co. just announced a limited edition run of the 2020 GT500 models in Race Red if anyone is interested. Making approximately 750 pcs., the details look amazing on these. Their original run of 1993 Cobras are going for quite a bit now...
Here is a good article about the 5.2l Predator engine development program. It also states that the oil separator will only come on the carbon fiber track pack cars.
http://www.mustangandfords.com/features/built-ford-fast