As you may know, the IBM Integration Bus is the successor of the WebSphere Message Broker. You may also know that to install the WebSphere Message Broker you also need to install a copy of the WebSphere MQ. And this is also true for the latest final version of the IBM Integration Bus, the version 9.
What you may not know is that the upcoming version of the IBM Integration Bus, the version 10, will no longer require a pre-installation of the WebSphere MQ, based on the current version of the IBM Integration Bus, the V10 Open Beta.
WebSphere MQ license is still part of the IBM Integration Bus package, but its installation will be required in only a few cases, such as when you want to use an MQ Input or MQ Output nodes in one of your flows.
To see what else is new in this fairly new version, you can refer to the latest release notes of the product published by IBM back in May.