I feel like Uldren won't make it to the city the way you're thinking. Mara was absent from her throne world. I'm certain she was the first to confront her resurrected brother. She may have the Queen's Wrath, but her brother is just as lethal and very resourceful. She would now control a seemingly immortal being that'd do her bidding. She has been planning and arming herself this entire time. I feel like she's thinking that Uldren will now be one of the biggest weapons she has at her disposal. And a side note; that Mara x Shaxx thing? Another ploy. What better way to get one of the most powerful Guardians to respond to you? Seduction. The third DLC shows a redjack. There's a good chance we could see the end result between them in that season, if not sooner. Or, it really could be genuine and she's looking for a King? I still see deceit and manipulation coming from this. Poor Shaxx. She's playing a much bigger game, here.