Missed the important word: ALMOST a terrible belly flop. When it only made $50 mil that opening weekend instead of the 9 digits they had to be targeting when they greenlighted a $200 million budget they could have been the beginning of a disaster of giant monkey proportions. Luckily for them it held audience well and probably came close to breaking even theatrically, so it narrowly avoided belly flop status. But if it had been a flash and die like most movies are today that $50 million opening weekend would have made it a flop.
By contrast, take Steven Spielberg's "Munich." That movie was a spectacular flop at the box office, but even more bad news is that all the other venues are disappointing as well. The film cost a lot of money to make, but it will take an estimated two years to even reach the amount of money it took to make. Now THAT is a gigantic flop, especially considering all the talent that was poured into it.