Unlikely. I'm not in the habit of repurchasing games I already own. Didn't buy OoT3D, MM3D, or WWHD.
If they made some kind of great improvement that makes me say, "Wow, if I ever replay Twilight Princess I want it to be this version," then I'll consider it. One such change they could implement... give me a real soundtrack Nintendo. You know what I mean. Enough of this bullshit. Don't you dare expect me to pay you for that synth garbage after you have already given me this. It doesn't have to be every track. Hell, it only has to be a dozen or so. You can do that.
If you're so concerned about preserving the original sound that you want to recreate it as faithfully as possible, there's this neat little game (pair of games, really) that you yourselves published over six years ago that had an interesting little feature. The games are called Pokemon HeartGold and SoulSilver, and they allowed the player to toggle between an approximation of the original soundtrack and a fully remixed/remastered sountrack made for the remakes.
No excuses. No developer wants to be compared unfavorably to GameFreak in the 'laziness' department.