I doubt Arabs will ever be able to take on Iran in any terms!
If history is the judge, a Saddam controlled Iraq fought Iran to a noholds barred stalemate. These two countries utilized chemical WMD on each other during that war. Now we all know in real terms how weak a Saddam controlled Iraq was when the US rolled into Baghdad in days not weeks or months. The current interim leader of Iraq has expressed his concerns about Iranian insurgents in Iraq. Once democracy takes hold, defending the democracy from the Iranian nuclear deterrent and the Syrian chemical deterrent will be a major priority. Granted the Iraqi democracy experiment could go the Euro route which would effectively weaken its potential military capabilities, but for some reason I think Bush wants a power house ally in this most excellent strategic position. A democratic Iraq with all that oil should be an economic powerhouse that could eventually rival the House of Saud. But we are talking years in the future theoritically.