I think the success of this cruise depends on a lot of things. Make it affordable and make it about the history, be respectful of the lives lost. Pearl Harbor is also a gravestone and a memorial, which people visit regularly. I have heard people talk about their visit to Pearl Harbor as an emotional visit.
I worry that James Cameron blurred the lines between fiction and fact that people won't see the Titanic as a place were many families lost their lives. People will see Titanic as special effects and romance. They will miss a lot with this view.