First of all, the product would be free and bigsnake won't focus on profits of any kind.
Secondly if he remakes everything from scratch it would be his very own work.
Third, in doubt change the name, put a simple space inbetween.
Forth, Idk but are content part of the brand? Again, change names.
Fifth, would Sony give a damn?
Sixth, how many story elements do you bring in? May I could help you with that. (I can't do much coding though).