'Superblock' ciphers?
There is already enough transposition in usual block ciphers to provide enough security. You could add a simple transposition cipher on top of a block cipher but there is little reason to do so.

It would be pretty easy to perform time based side channel on the cipher is it is spread across a disk or SSD. So that would already bring down the added security.

There may also be horrible performance decreases on certain media, as already mentioned in the comments.



Basically I don't see how such a scheme would add much security, and the implications of performing the transposition are too severe.

So yeah, I guess that block ciphers + common disk encryption schemes are already "secure enough" if there is such a thing.



Besides all that, if the block cipher gets broken, don't you think it would be relatively easy to put the blocks in the right position again?

Axapaxa also makes good observation on how this won't protect single block messages.