Hi. My initial thoughts on this are the following. However much we dislike the actions of the persons you mentioned (and perhaps others in the administration as well) such an arrest would seem to me very unlikely and would certainly not take place in the territory and under the jurisdiction of the US government. Other countries could do it, but first there would have to be an official indictment of the International Criminal Court, which is also unlikely.
Now, could it make one happy? There is a case to be made against these gentlemen, especially regarding the invasion in Iraq. Apart from the fact that punishing a criminal doesn't seem to be a happy occasion in general (the existence of a crime is always a tragedy), the objective of punishing Bush and Cheney seems to me to result from simplistic anti-americanism iin some cases, and from symbolist politics in other cases. It would furthermore create resentment in US public opinion. The US would regard the world as antagonists, which is negative for all involved.