[Is it possible to get LaunchBox or Big Box to launch MiSTer FPGA games or cores?]

You need something like that old 3DO blaster card for PC but with the FPGA hardware on the expansion card   

[Controls overlays / move lists in MAME]

On 3/12/2020 at 6:26 PM, ItchyRobot said:

Here is an example of me using a BigBox pause theme to bring up an image showing the layout of my Arcade controls (custom) and Gamepad controls (Xbox). From the pause screen I can select "View Manual" to bring up a PDF I created showing all the characters moves. Notice that both Street Fighter and Mortal Kombat each have their own custom controller layout images. I am slowly starting the process of creating all the control layouts and move lists/guides for my favorite games. For Visual Pinball X (desktop mode) I use the "View Manuals" selection to show the instruction cards.

BigBox Pause Theme: "Game Controls (Beta) 1.0.0b", by Retro808.

BigBox Theme: "Colorful (BETA)", by viking.

 

This is pretty much what I'm looking to do, thanks.  Have you looked into using CPWizard or CPWizBiz to generate control layouts?  I'm not looking forward to the idea of creating the images by hand so I'm hopeful I can use these tools but I haven't tried them yet