Are there no backups out there that could be shared? Isn't that something TPB did, create a torrent of all the torrents and metadata about them? Then at least all that information would not be lost.
They hit the self-destruct button. It's reasonable to expect that it's all gone at this point. The community will have to build something new and hopefully more resilient this time.
I've also read the self-destruct was for the encryption keys. The servers were taken but as everything was encrypted the destruction was of the aforementioned keys.