First, corrections: I have heard someone say this: I'm going to be explaining to you... etc... if I were him I would say: I'm going to explain to you.. .etc... Personally I think they are the same... you can say both the phrases.... but the first sounds strange to me... Can someone confirm both are right or say something about this question I have asked? Now for the answer to your question. Both ways of saying this are correct. The first just sounds like it will take more time. "I am going to be..." indicates a continuous process. Whereas, "I am going to..." is more direct.