User blog comment:Warmachine375/A possible Log Horizon x Sword Art Online crossover? Just a crazy idea of mine. Hehe./@comment-918376-20131128054417

I know that there's a crossover on FF.net between the two ... although at least in the part of the first chapter that I read, it seems to just be Kirito stuck in Elder Tale. He goes from SAO --> Elder Tale, stuck from one game into another.