According to various American sources, Holmes has been having a difficult time getting her career back on track since giving birth to daughter Suri and marrying Tom Cruise. Her agent has been searching desperately for new roles.
In addition to the normal "returning to work after baby" mode, Hollywood studios are afaid of the negative publicity from her conversion to Scientology.
Holmes, 28, will not be asked to return for the next Batman film. Nonetheless, she will be starring in the film Mad Money with Queen Latifah.