Originally Posted by Vengeance
Isshin being Keien, Ganju, & Kukaku's uncle doesn't create incest. It's a simple matter of saying that Isshin's sister or brother is their parent. I'm thinking Keien, Ganju, & Kukaku are Ichigo's cousins.
It's widely hinted that Isshin is the uncle they spoke about based on the past connection with Keien & the fact that "uncle" would get upset/disappointed with Kukaku/Ganju for sending Ichigo away. This shows that the uncle has a direct connection to Ichigo. As a father Isshin wouldn't want his son put in harms way.
@Pritha We don't officially know who uncle is. My money is on Isshin though.
I think there has to be a lot more than that for a reason.
Isshin has never been (from what he has shown) to step in Ichigo's way, even when he has come close to dying.
And what harm could there be in going to the other realm compared to going to Hueco Mundo or going after Juha Bach.?
(this is dependant on the translation) but do you remember how Kyoraku fits greeted the Zero squad? He said something like, what do you want this time? Kind of a weird way to ask (makes me also wonder when else they came down and what the hell they did).
I think it's just that certain people probably know a lot more about what's going on and maybe what this implies.