According to SAO Wikia on Twitter ... to bring his friend back… only to watch him die shortly after. Eugeo died while trying to kill Quinella, and his final moments were spent in Kirito ...

There’s also a trailer for the SAO Last Recollection Ritual of Bonds 1 and 2 DLC. It starts with Kirito in his tux, ahead of going into the Obsidia Castle dungeon that requires people to battle ...