When November comes around, we already know we'll be granted the power of Stasis. The darkness itself. We'll gain these power and most probably be the ones to harness both Light and Dark without falling into darkness completely. Question is. "What does this have to do with Zavala?" Let me tell you my thoughts on exactly that. It's no secret that Zavala is looking trust in the Traveler, in the Light. He's grown very doubtful over time. Pair this with everything we've achieved. We aren't just 'a guardian'. We're 'the' guardian. Day's after being revived we stepped into the Black Garden and killed the very thing that was stopping the Traveler from healing. We stopped threats like Crota and his father Oryx. The Vex in the Vault of Glass? We went down there to stop what they were doing. When the Fallen harnessed Siva, we did what the Iron Lords couldn't, then became an Iron Lord ourselves. We were the first guardian to reclaim our power, our light, and with that we helped lead the charge towards taking back our home, the last city. When Calus called upon us, we answered and we impressed him. When Riven, the last known Ahamkara needed putting down, we went ripped out her heart. Not to mention returning to the Black Garden when Eris called upon us. All of this, and even now, as we go forwards towards Europa, it seems to be up to us again to lead the charge towards the unknown. This isn't to say that Zavala hasn't had his triumphs, because he has. What I'm saying is, what if over time Zavala has grown jealous of us, the guardian. This is what I think is going to happen: We travel to Europa and after some time, harness the darkness, we harness Stasis. We return to the tower and obviously Zavala finds out, that being if he hasn't already. This is the tipping point for Zavala. Gaining this knowledge pushes him to the dark. He is the first guardian we see who has fallen completely to the Darkness. All Zavala now knows is hatred for us. The guardian who he feels, took everything from him. If you've read all off this then I sincerely thank you! I may have gotten some things wrong but I appreciate you for reading non the less. Have a wonderful day!