I have a feeling that the rumours sites are wrong on this one.
As mentioned above, they are likely working on a home hub of some form and I'm going to guess that they are also probably going to incorporate it into a new Apple TV at the same time.
Time Capsules will be dropped because we all have massive data caps now so we can just load everything we own into that free 5GB of storage Apple give us with our iCloud accounts. Oh thats right that only works in the US like most of their wonderful ideas. (Pet hate, even when i worked there)
The express will also be dropped too so that they can sell more Apple TVs, you can have one in every room hooked up to every TV. Then have a primary in your lounge room and secondary devices scattered around all expanding your network and making the whole house one large connection point.
But thats just what i can gather from the way the rumours are playing out lately.
or, I could be completely wrong.