Mostly why they HAVEN'T made one is because of the hundreds of people who died on board, Respecting or Honoring them in a way.
Personally, I feel the name 'Titanic' or 'Titanic II' is just bad luck. After all, they said Titanic couldn't even have been sank by God.
Look where she is now. /Cry.
The idea of them making another one to Honor Titanic is sounding excellent, through I have my doubts they would actually make another one.
I do feel as if the name brings bad luck, as I stated above.
If you do think about it, they made a Queen Elizabeth II, Queen Marry II, I believe a few others as well.
In this case it's a ship to honor those on board when she sank. Along with honoring her.
I would really love to see a ship honoring Titanic, RMS Queen Elizabeth and Queen Marry had second versions of themselves.
So, yes. I'd be delighted to see a new Titanic although I have doubts.