Do you think there are any truths behind the roumors that there will be a sequal

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While watching some time ago. I saw fan-made trailers for a Titanic two. One was turned into a fan-made move.... another suggested there would be a sequel coming out in 2012. So how many of you think this is possible? Are there any truths behind it? Or do you think its purely fan-based. If they would make a Titanic two? What would the story be based on? From the clips I'd seen it was an alternitive movie based on an alternet ending.