If it's not trailers, it's teasers; if it's not teasers; it's images. By the time a blockbuster finally arrives, if you haven't heard so much about it that you want to scream -- from overload or delight -- the studio's marketing team hasn't done their job. But how early is too early to begin promoting a movie?

Pointing to this week's release of a teaser trailer for M. Night Shyamalan's The Last Airbender, more than a year in advance of its planned theatrical roll-out in July 2010, The Big Money wonders if that's a good strategy...

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