Don't count out the possibility of planets orbiting stars in Orion"s belt. The constellation known as Orion actually has a very large complex of nebulae, most of which are star forming regions. The three stars in the belt are Alnitak, Alnilam, and Mintaka. It is quite possible that each of them have planetary systems. In my opinion, most stars in the universe would have to support planetary systems. It is only because our ability to detect extra-solar planets is still very limited that we do not know whether this is true or not. As new and more powerful instruments for studying the universe go into operation we will find much more than we have ever found before. Already, our observation skills are good enough to detect planets orbiting stars that are nearer to us than those in Orion's belt.