I think all the tourists trampling over the graves looking for his grave is macabre... also wanting to go and peer in at her house...
They were showing it for all the first weeks after ANS died, on ET or another, showing it covered over with plywood, but already dug, as if for ANS.
Now I'm thinking that was possibly Daniel's (although the one next to this one has brown grass and the others don't, because it's new sod squares, just put back on top after burial)? No, they wouldn't open it up with him in it, even tho they've been saying she will be buried on top of his, would they?
Maybe there's something down in the ground that's on top of the coffin that's already in there, for when they open it up to put a second coffin in it - like some kind of platform.