No there is no bad blood I am sure. There was a rumor about six months in after Destiny's release that Bungie wanted to go back to Microsoft because of how badly things have been handled under Activision. Again that is nothing but rumor. But at the same time that rumor is a little more believable when you consider Destiny was originally planned to be exclusive to the Xbox 360 and Xbox 720 (before the official name) for at least a year. Bungie had spent the past ten years working with just Microsoft and clearly were very comfortable with them. Then something happened, again most likely large sums of money was involved, Activision flipped on the original deal and signed exclusive deals with Sony. And because Bungie is not the distributor they had no say in how that deal went down.