Interesting thought! Maybe a BBC version of Dont Stop Me Now, done somewhat like the "Long Lost Guitar" version? Tho that wouldnt really be anything we havent heard.........hmmm...........
BBC version of 7 Seas, done with an outro similar to that of the 2011 instrumental mix?
Or maybe a version of Jailhouse Rock, which I recently learned was in fact recorded for the debut album.........possibilities are endless........