[ElProximo]

No reason to be using a 'Death Theme' because you do want people to associate a 'NEW' BB season on the way.

If you DID want to have a 'Dead BB Eye' then I would think the classic cartoon:

X X
----

Or of course a coin over the eye would work too.
Or just a closed eye.

Now I submit to the producers they may, at some time, have a 'closing eye' graphic at the end of the series if they want to be a little clever.

But having said all that I do think they want to end on the happy note and leave you with the impression that BB 'Lives on'.
It lives on in our memories, our hearts, our swelling type regions and in DVD box-sets,
and,
possibly in a new format on a different channel for some kind of cash trading ahem.

Besides.. BB already 'died' last season in what was apparently the 'spare extra-feature season' and ran like 2/3rds of the BB producers, crew and much of the staff had already passed away.
So if anything this season is the theme of 'wide awake for one last hurrah!'