I don't like being a grumpus about films. It brings me no joy to report that the recent spate of Disney live action remakes like Beauty and the Beast and, uh, "The Lion King" (in quotes 'cause is it really live action?) did nothing for me, rendering me sleepy with their ho-hum indifference and redundancy. However, the upcoming Mulan remake seems more and more like it's gonna turn that trend around. And with every new piece of footage I see -- including a new spot just released by Disney -- I get more and more excited. I'd love …