It's still very possible.
Everything that happened in the whole series is still the direct result of Urahara's subtle manipulations.
Consider that the Vizard said they knew about Aizen's trechery long before Ichigo or anyone else. Why didn't they tell anyone about it?
Because by using hollow powers Soul Society said "fuck you" to them, so they said "fuck you" right back and cut their ties and stopped giving a shit.
And it's Urahara that ultimately turned them into Vizard.
And why didn't Urahara tell anyone about Aizen?
Because it's all part of his plan.