I wouldn't mind voice acting either but it would need to be done right and that is rarely a doable thing with voice acting. Though i think it'll happen at some point. Link is starting to speak already, we see him clearly conversing with characters in SS, we have options to reply with in SS too like after the Lanayru mining facility with "Am i late?" "protect Zelda", so Nintendo are becoming okay with the idea of putting words in Link's mouth it seems. And on a lesser note IF (no matter what the historia says) the Hero's Shade IS a version of Link, then he is talking there too... next step is for us to actually hear him. think Nintendo will do it, i also think that they'll really shake up the franchise sometime soon too with a massive/risky move, since the series can do no wrong by doing so.