Concurrent iOS Deployments
Yes, you can submit multiple version to iTunesConnect.  I often create my next 1 or 2 version 'placeholders' in iTC.  Just don't submit the placeholder versions for approval.  

Your challenge, if you decide to do this, will be to keep all your versions and source code intact. Because of that, I don't upload the app package until I'm ready to have Apple review it.