Could it be this easy?

[lhunneb]

No: HPFGUIDX 61077

I think that what you describe is *possible* but not at all likely.  
I think that Sirius is intended to stay for the remaining three 
books.  He can serve the plot very well that way, because of all the 
possibilities associated with his character:

1) Not a lot of people know his true nature, so there are lots of fun 
plot possibilities there.

2) He loves Harry and is on the right side, but he's no push-over, so 
he can be tapped to do some unpleasant jobs.

3) He serves as a dramatic tension partner with Snape.

I'm sure there are other good reasons to keep the character around 
too.

--- In HPforGrownups at yahoogroups.com, "wildfemnight" 
<wildfemnight at y...> wrote:
> Ok So I'm new to posting here and don't know if anyone else has 
> already touched on this subject or not, but here it goes...
> 
> I'm wondering about the death that is happening in OotP and I can't 
> help but to wonder if it's something so simple that we wouldn't 
even 
> think of it. I think it could be (and I hate to say it) Sirius 
Black 
> and here's why.
> 
> On page 712 (US paperback) Dumbledore makes Sirius reveal himself. 
> This means at the end of book 4 the only people who know about 
Sirius 
> are Harry, Ron, Hermione, Lupin, Peter Pettigrew, Dumbledore, 
Snape, 
> Mrs. Weasley, and Rita Skeeter. Dumbledore sends Sirius to alert 
> the "old crowd" which includes some names not on the list of those 
> who know about Sirius. One of which is Arabella Figg who we pretty 
> much know watches over harry at privet drive. So what if Sirius 
goes 
> to her and she, not knowing his story, kills him in an effort to 
> protect harry before he can explain? 
> 
> Maybe I am way off here but I would like to know what everyone else 
> thinks.  
> 
> "Wildfemnight"