In the new Nov-Dec 2014 LEGO Club Magazine, I found another thing that is pretty fun and creative. By using parts from the The LEGO Movie Super Secret Police Dropship (70815) or from your existing parts, you can create the Super Secret Police Mech shown above.
On the LEGO Club website, they have provided free instructions for the Police Mech in PDF format. There are 321 LEGO pieces used to create one of these mechs. This is a cool addition to your Super Secret Police army if you are able to create one.