...Well that's what I think it must be about every time I drive past the billboard. For those not in the know, a "morning glory" is British slang for an erection on awaking from a night's sleep, or "Nocturnal Penile Tumescence", if you want to get technical. Or 'morning wood' for y'all Americans.
Googling the movie tells me it's about feuding anchors on a morning TV show, but I'm going to continue thinking it's about Harrison's Ford's schlong, thank you very much. I wonder if the movie will keep its original title for release in the UK?