The research on unconscious bias is
not nearly as robust or clear as one might think.
Research doesn't support the idea that implicit attitudes
can change very much, but even when they do it doesn't change behaviors. Short-term changes also
don't seem to lead to long-term changes. These measures
don't predict behaviors (subtle or deliberate) well in terms of race, which is the most common measure. And in terms of training, even the pioneer of the Implicit Attribution Test (Tony Greenwald) admits that implicit bias training
really doesn't do much.
If this is what Disney is going for, I think they're taking a misguided approach and probably wasting a lot of money in the process.