Do Die Hard 6 as a book like Heat 2?
No chance of Willis doing another DH now and a younger actor headling as McClane (with deepfake BW for what would have to be fleeting sequel parts) woudnt really work so may as well let the fans have the movie in an official book form (or graphic novel)
could even do all the various scripts that were considered for Die Hard 6 as there was probably at least 3 versions (this GF2/Heat2 style 'McClane' sequel/prequel, a proper sequel involving another Gruber, a McClane in Japan/Nakatomi anniversary thing etc)
or maybe BW could have someone write a book about the whole Die Hard saga including what happened with 6 , fans would want to read it for sure. (not an autobiography just all on Die Hard, although I guess it would be more likely to be a full autobio like Arnold did with just the odd page on his various films)