I read a book about 2012 and the prophecies/possibilities, approximately 600 pages book. Right now my parents is borrowing that book. This book was very interesting I've read.
The book doesn't even mentioned about the Nibiru/Planet X. Sorry, but it don't. It mostly talk about how we changing our world and our cultures, also it talks about mostly of the theory of our existence and the universe. Some of the prophecies sounds very exicting, such like we probably go advance into the planetary system from the nation system, there are 9 underworlds according to this book that I talked about. Other things that this book talk about is when we discover other new planet, we tend to have very impact events at about the same time.
Also interesting thing I want to say, fire is the first and it create the air, then fire and air both created the soil, and all three, fire, air, and soil all create the water. All of them combined create the life. It's part of the universe.
There are too many prophecies in this book that I couldn't remember all of them, but they sounds good. Like we start to eat the organic foods, we use the technologies more often like the cell phones, computers, etc. The women start to have their own fulfilled rights as men, and everything.
I've done much research on the line about 2012 and found out that the Nibiru/Planet X or doomsday ideas was actually comes from just a woman, Nancy. Her website is the Zetatalk, the link is this:
ZetaTalk
You might find a lot of pictures of the sun with other noticably planet around the sun, with the stars maps. It is pretty obsiviously that this planet around the Sun was actually our neighbor planet, the Venus, if you look at the star map very carefully.
The NASA doesn't have any evidence about any planets hitting our earth. The NASA said if there are any planet, then it will be able to be visible from naked eye at the sky.
The Wikipedia has good article, the link is:
2012 doomsday prediction - Wikipedia, the free encyclopedia
So I don't really see anything that make 2012 a doomsday, but a interesting positive future. Who knows anyway