I'm not talking a straight reboot where you change the storyline. I mean an HD release of the original Shenmues but this time around Sega can do some serious analysis as to why the original games failed in the sales department. Once the analysis is complete, they could then somehow incorporate elements that make a game sell into these HD releases while still preserving the integrity of the original Shenmue games.
Also, it could have been possible that the games were not properly marketed at the time. Just look at games like Infamous: Second Son and Watchdogs. What if Shenmue were marketed like that? Along with the HD rerelease, maybe they could recast some of the voice actors too as in my opinion the VO was terrible with the exception of a few characters like Ryo and Lan Di.