Another teacher and I have been trying to get our school to start a dedicated media studies class -- or possibly IB Film (we teach the International Baccalaureate). Our wonderful proposal (all on paper) met with a chorus of ambivalence. They presented the old argument that it should be taught within subject classes, which is true, but we feel it is the right time to start something more thorough, explicit, committed. We intend to keep plugging.
Before I put hours and hours into it, I would love to hear that someone else has already created or knows of a presentation (PowerPoint? If necessary.) that promotes media literacy in an exciting, multimedia way.
I would also suggest you look critically at the IB standards/curriculum/exams for all subjects. If you can find a way to show your colleagues how a film course would be an interdisciplinary way to support all other subjects, they might understand the legitimacy and importance of it, especially since many of the exam questions use current events. As a Language B (Spanish) teacher, I am always using elements from other courses as a way to start discussions or teach concepts (i.e. when students read Things Fall Apart by Chinua Achebee for Lang A class, we use the characters to talk about family and comparisons with our own). If you can, find out what is being taught in core classes at the time of your presentation and show how you would take that idea and create a film unit around it.