I'd really *love* a remake of
Legacy of Kain: Soul Reaver, maybe even one that merged
Soul Reaver 2, as it was originally planned by Amy Hennig (both games were initially designed as a single title, but the tech of the time and budget constraints made that impossible, they ended up splitting it in two games, instead).
I think Soul Reaver is one of the best games ever made, especially if you're a fan of classic action-adventures. Great story, superbly written characters, an impressingly deep philosophical premise that you can't still find in most games made after it. But, unfortunately, the game aged poorly both in terms of graphics and gameplay, and I've come across a few people that simply couldn't get into the game either because it looks "ugly" or because it plays like crap.
You didn't even need to upgrade it to contemporary "AAA" graphics; just use something like the engine in
Legacy of Kain: Defiance, which I think already looks good enough for people trying to get into the game for the first time. Though a better looking game would obviously appeal to even younger players, I guess, and it doesn't make much sense to remake a game, today, using an already very old game engine. Heck, even if they used something like Unity the game could look better than Defiance.
But the *real* issue is the gameplay. Don't get me wrong, if you grew up playing action-adventures, Soul Reaver plays decently enough -- at least it ditched the tank controls of the original CORE Design Tomb Raider games --, everything just... works. But just because it's "serviceable" enough for us older players, the fact still stands that it feels slow and clunky, and combat is way too simplistic and gets boring very soon into the game (it's not the main focus of the game, but, still, there is a *lot* of it, and you might as well make it at least more interesting and engaging). Combat in Soul Reaver 2, on the other hand, gets way too complex and punishing, so they should find something in-between; probably a system like the one in Defiance would work well, as long as they ditched the annoying fixed camera angles.
And I guess that's it; maybe add some of the extra content that was planned but ultimately left out, too, as long as it doesn't go against what was added in Soul Reaver 2. Just do a graphical overhaul, make the gameplay smooth and fluid while merging Soul Reaver and Soul Reaver 2 into a single game, and you have yourselves a winner; a game a whole lot of new generation gamers would downright love, because it is no longer hindered by boring, slow gameplay and looking like crap in their eyes.