If an hipothetic shenmue is on the making, I really doubt that launching the original 2 releases will be a great idea to capture people's attention, since the original games had aged badly, in the sense that even though the concept was super revolutionary on 1999, now those games could feel really slow or badly designed by modern gamers (hell, even in 1999 some thought that)
I think that a better idea will be to find a way to show the most important parts of the original 2 games in shenmue 3, playable if possible
Now all of this should consider the big IF shenmue is released, at least I only want to know how the story end, if ryo could avenge his father, or something like that