August and Gajeel might be alive in "Fairy Tail" chapter 489. Also, the Tartaros arc is set to be unveiled in the chapter.

According to Bit Bag, "Fairy Tail" chapter 489 will see an angered Brandish. The website reports that this is relevant to what happened to August. It is further revealed that she might unleash her anger on Mest, due to what he did. While August could be dead, it is also rumored that he survived Brandish's blade, which would mean that he is still alive.

In addition to Brandish's rage, it is rumored that Gajeel might still be alive in "Fairy Tail" chapter 489. As per rumors, the character could also be trapped in another realm, which opens a possibility that he and Levy could still be rejoined. It can be recalled from the previous chapter that Gajeel was sucked into the portal, leaving Levy emotional.

Lady Eileen and Acnologia are also set to cross paths in "Fairy Tail" chapter 489. It is believed that it is either they are set to fight, or that Lady Eileen has other plans to execute. Along with this story arc it has been revealed that the Scarlet of Despair is the fifth dragon slayer.

Meanwhile, the Tartaros arc is set to be touched on in "Fairy Tail" chapter 489. According to Hall of Fame Magazine, the arc involves nine demons as the primary antagonists who think that they are made to be Zeref's servants and offer their lives for the latter's welfare.

In the end, however, whether the aforementioned details transpire or not are yet to be revealed.