When will your current project be completed, or when will be the next logical time to be able to leave on good terms with your team?

This question demands for an honest answer, but at the same time you also need to be aware of the company's requirements and if there is an urgent need then you need to be prepared for that as well. If you are unable to leave your current job for certain time period, you should say so right here. You can figure out some way together to meet their requirements if needed. Similarly, if you have a project bonus that is paid out on a certain date, let the interviewer know.