I also have hope: that this will end with Rukia arriving and doing her best "don't MAKE me come down there!" face right before calmly placing herself in front of Ichigo and briefly imprisoning him in a pillar of ice.
...Wait, wrong fandom.
Actually, I think it would be cool if Isshin showed up, gave his kid a flying kick to the head, and then explained this whole mess. ("Well, son, turns out your mom as Vasta Doña, and knowing my exquisite tastes of course I fell in love with her even though as a Shinigami I probably should have hunted her. That's why she was so tasty for the King Fisher, God rest her soul, even though she blanketed her power to mix with us poor lowly mortals. Funny story, when you cross an ex-Shinigami with an ex-Hollow, well, you get the incarnation of the King whose palace Aizen is trying to enter, so yeah, it's kinda your duty to protect that area, which is probably why you were born, and also your sister and royal counterpart, too -- did I forget to mention that? Yeah, there were two babies. We had to split you up for your own safety, 'cause we knew some total d-bag like Aizan or Ichimaru might come after you. Like in Star Wars. Only you and your sister look alike. There's gotta be a redhead around here somewhere...")
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...Wait, wrong fandom.
Actually, I think it would be cool if Isshin showed up, gave his kid a flying kick to the head, and then explained this whole mess. ("Well, son, turns out your mom as Vasta Doña, and knowing my exquisite tastes of course I fell in love with her even though as a Shinigami I probably should have hunted her. That's why she was so tasty for the King Fisher, God rest her soul, even though she blanketed her power to mix with us poor lowly mortals. Funny story, when you cross an ex-Shinigami with an ex-Hollow, well, you get the incarnation of the King whose palace Aizen is trying to enter, so yeah, it's kinda your duty to protect that area, which is probably why you were born, and also your sister and royal counterpart, too -- did I forget to mention that? Yeah, there were two babies. We had to split you up for your own safety, 'cause we knew some total d-bag like Aizan or Ichimaru might come after you. Like in Star Wars. Only you and your sister look alike. There's gotta be a redhead around here somewhere...")