I've spoken to Shadow about things. So I got the matter driven home to him about the reality of power situation. So you don't have to worry about that.

As for the arc though, if Evangel character is an arrancar and from the sounds of things a reoccurring enemy or something. Wouldn't it be better to work things a little slower? As I said sounds like you're rushing things. What might work a little easier on things than having to deal with arrancar but still introducing the character could be something like this.

We are dealing with the stated hollow issue. The hollow issue grows finding out there is a hollow behind those hollows. Not quite the menos or gillian, but something pretty high on the normal hollow food chain of things. He's pulling the strings. We deal with the issue and that hollow thinking things are resolved. However, it is shown that hollow was just working for someone bigger and this was just a prelude to things to come. We can get some ominous warning or maybe a menos rescues the hollow as we got that warning then. It's not the end, but the beginning. Case is solved, but we know there's still trouble.

That would help to scale things back some and provide the introduction for Evangel character. Then you wouldn't have worry about dealing with the immediate issue, you can make it a lingering one. Because it sounds like you want to work things that way anyway, so it sort of fits in line with that line of thinking.

Because I'm on board for the first part of your idea. No problems. It just the kidnapping, feels really out of place and character. If they want to toy with us, they'd just do it there. They aren't afraid of anything at the moment. I would think that they was just make us their dolls right there and then the Captains or whatever show up and they leave. They can even put us in that other dimension in the real world. If we are kidnapped Yamamoto would just write us off. I mean in his eyes we are a bunch of no body out of the academy shinigami. Why would he risk more shinigami saving us? He's been proven to have a pretty cold heart about these matters.

So if you want to go with what you have I think from a story stand point it would probably make more sense just to toy with us in the real world and get saved there.