Interesting. Is he the first person, apart from Leonard Nimoy obviously, to appear in a prime-timeline story and nu-Trek?
There have been several, depending on what you consider "counts".
Wil Wheaton and Majel Barrett had voice overs.
and W. Morgan Sheppard
had speaking and somewhat memorable roles in the film.
, Anna Katarina
, and Christopher Doohan
, if those count, all had cameo appearances.
I wouldn't be surprised if there are others.