I'm not so sure Hyde's story is over. We don't know what his last command to Gold was; seems to me, it could have been, "Make me appear to die of Jekyll's injuries." As part of his alliance with the Evil Queen, this would have the benefit of potentially causing Regina's death, if she kills herself or someone else kills her in an effort to destroy the Evil Queen, but in actuality just frees her entirely.
I'm intrigued by the revelation that Regina retains the capacity for evil; by implication, the Evil Queen retains the capacity for love and the potential for redemption.
