Not that I want any help with this, I just found it funny that my son managed to get the game to crash.
Unmodded Wii U running the latest update of the disk-based game.
Error screen looks similar to the DSI errors:
And one thing that he noted was in line 2: The name of the map in the crash message isn't the name of the map in-game:
The name of the level is "Nuketown 2025".
Just thought I would share this with everyone.