I'm not expecting them to displace any of my three favorite albums by them, and nor should anybody else, really. Why should you? They're so far into their careers and in unprecedented territory. As others have said, their legacy is signed, sealed and delivered regardless of what this album is like.
Am I excited for it though? Yep, without a doubt. They're my favorite band, and even on my least-favorite albums by them, there's always a couple songs that stick with me.
If nothing does? Oh well, that'll stink, but I have their other albums and other music to listen to. But they're still my favorite band and probably always will be, so it's impossible for me not to be excited -- even if I don't think the overall quality will be on par with say, Streets, Until the End of the World, Gone, Bad. And should anybody expect that? Those are some good fucking songs.