Final Justice is a space shooter that thankfully, mercifully, has nothing to do with the Joe Don Baker movie of the same name.
Hidden Text#
The first message is right at the start of the ROM:
NEXT GAME ADVENTURE CHUMYThis is presumably the name for a sequel to Compile's Hustle Chumy. It was in development at one point, but it was never released.
(Source: Satoshi Fujishima)
The second is at 0x1971:
FINAL JUSTICE BY PAC. 1985/3/31(Source: Original TCRF research)