Bioshock Infinate to out sell previous games?

Analysts are predicting the new Bioshock game due out in 2012 will out sell all the previous Bioshock games. Prediction are hoping for nearly 5 million copies to be sold which would be over $200 million. Bioshock 1 and 2 have sold over 3 million copies to date. I have only played Bioshock 2 which I thoroughly enjoyed. I will get round to playing the first game before I start on Infinate though. I reckon these predictions could well be true as Bioshock seems to have got a pretty solid fan base. Whether it will sell the predicted 5 million is still to be seen, it definately has the potential though. I know I will be buying it some point down the line.