Could Apple take iMessage to the next level at WWDC?

iMessage is one of the best internet messaging services because of the simple fact that it is built into the OS and integrates seamlessly with SMS. However, I think Apple needs to do just a little bit more and they could absolutely DOMINATE the instant messaging space. They can destroy BBM, Whatsapp, viber, hangouts and all the rest. What they need to do add the group function and sharing features that BBM and Whatsapp have. Take all the features that those apps offer over iMessage and steal them. If iMessage can round itself out with those functions, it will destroy the competition because iMessage has the number one killer feature, which is it's SMS integration. Would you see Apple ever turning iMessage into a BBM like app?