Just because her body is dead dosent' mean Emma is. She could have evolved to the point where she could exist as pure psionic energy. The group has already faced one villian like that. So Emma could be able to come back.
I also think Emma for reasons of her own could use her powers to make everyone think she was dead.
ZachWZ
I also think Emma for reasons of her own could use her powers to make everyone think she was dead.
ZachWZ