During todays UFC 102 pre fight presser Dana White was asked about the addition of new weight classes in the UFC. His reply was that lower weight classes would be added. When asked when he replied soon.
He was also asked about a merger between WEC and the UFC, He repeatedly avoided the question with a laugh. This brings me and everyone that seen the press conference to believe that the two will merge soon. I believe that you will hear about this for sure sometime before UFC 103.