Didnt he do a lot more games later on ? The 3d sequel to Another World (called Fade to Black) and some more stuff ? Don't know how well he did with them...
As I said - I do understand if he wants to stop a GBA (or a mobile phone or some other mobile device) remake from being done - cause there is actually some money for him to be made... but not a Windows or Xbox or something similar port - since there he can't make anything, it actually could be a good advertisement for the game and could boost the GBA or mobile version sales.
I know this because I am working on a mobile game and there IS probably gonna be a FREE win32 and maybe macOSX port of it just because of that ;-)