Once the analysis is complete, they could then somehow incorporate elements that make a game sell into these HD releases
No thanks. I don't want a Shenmue full of shooting, killing, stupid licensed music, profanity and tons of tutorials.
And yes I deliberately left the second half of your sentence out of the quote.
How is Sega supposed to make Shenmue interesting to the current market without ruining the game?
We all know what kids these days love about video games... Why should they even try it in the first place?
Shenmue is anything but mainstream and it simply shouldn't adapt to other games at all.
That's Shemue's strong point after all.
All that Sega should do is simply market it as just that! A unique experience among the endless stream of soulless action games.
I agree that some things need to be updated in a remake though. Smaller things that simply make the game more enjoyable and use the power of the current hardware. A time skip option, save anywhere, modern and classic control schemes, better animations for the NPCs, a newly done dub, more to explore and such.
You don't need to look at other games to figure those out. I repeat myself: Shenmue should stay Shenmue and Sega should market it for it's "uniquity".