Good Christmas list. Thanks, I did some google-fu but found just a the slide with the NG and the proposed C-130XL for Herc concepts, besides the past proposed amphibian Herc, which would be cool to the power of 10.
One thing to add to your list, a new JATO system.
Follow on to post:
C-130.net article on a research C-130B in the 50's with boundary layer control over flaps, controllable down to 60 knots but just some lateral control concerns...
https://www.c-130.net/g3/c-130-photos/North-American-C-130-Photos/USAF-C-130/2013_Spotlight_Web_C130B_C_130B_BoundaryLayerControl_001_1267828237_8045
and from NASA
https://history.nasa.gov/SP-3300/ch8.htm