Today, IESB asked Nimoy if he would be willing to do a voice in the movie. Sadly a video of the exchange could not be posted due to a press embargo on Star Trek stuff in the states until May 7th. This is usually done by the studios so that there is a huge amount of talk about the movie before the critical opening weekend and most sites are not going to breach it for fear of losing access. It is also a way to contain bad reviews but that isn't an issue in this case as Star Trek reviews have been glowing.
I am paraphrasing our conversation. Nimoy was in a great mood, laughing and having a good time and said he would be perfectly willing to do a voice in the Transformers sequel, all Michael has to do is ask - but has he?Since it is voice work which can be done in a day or so under experienced hands, Bay still has plenty of time to cast who he wants when he wants. Of course with the world premiere now schedule just six weeks away the clock is ticking.
IESB asked Nimoy straight out if Michael Bay has contacted him yet regarding the voice work, Bay has said he may use his mother as a go between if need be.
Nimoy said he had just seen Bay's mother and she didn't say anything. He doesn't think she wants to be the go between. Nimoy said that he's not hard to get ahold of, if Michael wants to get ahold of him, he can.