Yet another question:
Will A Voice Actor Ever Get Nominated For An Oscar?
And the obvious answer ...
Perhaps nominated (never underestimate the power of our fine conglomerates) but never elected. The Academy has a large contingent of actors, and most would sooner tear out their fingernails than grant an Oscar to a thespian performing only with his vocal chords.
But along with voice acting, there's the issue of emoting via mo cap:
... The onslaught of award-winning motion capture has presented us with a more realistic possibility of an Oscar-nominated performance. I strongly believe Zoe Saldana was snubbed by last year’s Academy Awards when she was not nominated for Best Actress. ...
Don't think so. Journalists have this idea that there's "animation" done by artistic nerds called "animators", and then there's this new technology called "motion capture," where actors in wired nylon leotards drive the performances.
Animators, of course, are heavily involved in both disciplines and technologies, despite the denials of various high-powered film directors.
If you're going to give a little golden man to an actress for motion capture, you should probably hand out duplicate statuettes to the people hunched over their computers, tweaking and polishing her performance.