From speaking with Blizzard they said they would do a full research on the battle net account and not the individual accounts within it. They said that they would restore the accounts pre-hack once the investigation was complete. I am 8 days now from the original hack and still no sign of any restoration. From what people have posted here, I believe gear etc will be mailed to the toons and Blizz said they will take care of moving the toons which were transferred to other realms.

I think you may have to wait for the restoration before deleting your bank alt though, possibly worth calling blizz and asking them to extend your RAF expiration date? Not sure if they can do it, but worth a shot.