[sayde]

Translation by Estella May from BleachAsylum
Kubo-sensei confesses! The Arrancar are also in his plans!!
Tite Interview
Q: In the new arc, the shinigami will of course be represented, but will other characters from the past also appear?
Kubo: Yes, if the arrancar appear, I think they will stand with the shinigami.
Q: Will there be characters that appear in the role of a friend?
Kubo: Ulquiorra has already turned into ash. Grimmjow might become a friend. Also, what about Harribel, who is still alive? But, I wonder how I’d bring them out of Hueco Mundo. I think Harribel would not leave Hueco Mundo.
Q: Was the idea of arrancars becoming friends in your plans before this break? Or was it just a feeling that they might return?
Kubo: “They might appear.” Or it could be that “they might not appear.” (laughs) Even if they did appear, it wouldn’t be individually, but as a group.
Q: What about Nel?
Kubo: I think I will let Nel appear.
Q: I’d really like to see her interactions with Kon.
Kubo: Kon did not appear in the Lost Agent arc. But to tell the truth, he has rarely appeared since the end of the Soul Society arc, roughly five years ago. (laugh) People who only recently started reading might not know that he exists. (laugh)
Q: It can’t be that you’ve forgotten him?
Kubo: (laugh)

Nothing is official yet. But it's likely what will happen.