About This File
The patch removes the letterboxing (top and bottom black bars) from the game at all resolutions.
Simply unpack the files to the main game folder (e.g. \Batman The Telltale Series\)
At 21:9, use it alongside the TelltaleWidescreenPatcher.
Tested the latest Steam and GOG versions at 2560x1080.
After 13 hours on research into the issue in a disassembler following a request, going with 3dmigoto made the solution incomparably simpler.
You can buy me a coffee here.