Official Sword Art Online hinting a special broadcast of something nearing the end of 2013.
— TVアニメ「ソードアート・オンライン」 (@sao_anime) August 10, 2013
The tweet just says there will be something coming at the end of 2013 and that it’s called “Sword Art Online: Extra Edition”. Some of 2ch are convinced that it’s hinting the 2nd season with one of those summary OVA’s and whatnot. The fact that there will be a second season is pretty obvious considering that there is still a fair chunk of material left to cover, plus the fact that the season 1 did really well. The only question is, when is season 2 coming out? Thinking logically 2013/2014 Winter anime season would start airing in January, so that would be start of 2014, so it’s more than likely that these will be summary episodes which are often shown before the a 2nd season. They may also just be regular OVA’s, who knows, seems like strategical hype from SAO staff in a way. More details coming up later.
Update: confirmed that this will be a summary with few extra scenes.
Magazine bit via @Chise_nya