I have an eccomerce site that has been hit by Penguin( we'll call this "site A"). My plan is to build a new mini site (already done - Call this "site B" it has the same directory structure as site A ) I plan to kill site A for a few days and request deindexing in WMT for the whole site. Once it is out of the index I plan to switch the domains around so my old eccomerce store is ranking again but obviously with a new domain name. My original domain will be be used for the mini site I built and left on the back burner for now. Could this cause issues with duplicate content? The reason I plan to do it this way is that im still not sure if site A will come back at some stage and I don't want to go to the trouble of building a new eccomerce store with all new content.