Just to clarify- do we know if Tim Allen even WANTED to do the role in LIGHTYEAR? He'd done it in all the Toy Story movies and, for all we know, may simply have been sick of the character by now.

Also, if this is meant to be the series the Buzz Lightyear figure was based on, isn't it likely that the Buzz voice in the series would sound younger than it did when Tim played it, and that, by itself would justify the casting change?