I like the last concept a lot. We are talking about human-centered innovation, after all. However, I think it does need the explanation and connection with the text part. You could maybe work on integrating the two elements a bit more.
I hate to say this but this design gives me the feel of "it's not over until the fat lady sings". Is this what you are going for? If so you did it. I think it has potential.
i like the other ones more. this one though is also not bad. : )