I kind of had a feeling this would have a dissapointing opening. Here are the reasons:
#1.All of the bad press surrounding Cruise and scientology (having the Cinderella Man effect passed from Crowe to Cruise)
#2. 3rd films are VERY rarely as sucessful as the first two
#3.Becuase of the huge success of the second installment, many probably feel it can't rise any higher than that
#4.Limited marketing lead to limited knowledge of the film or its plot leading to limited interest
#5.It's not summer yet....