Looks like severed Anakin is also making his appearance in RO
Maybe the guy in the bacta tank actually is Darth Vader then.
It seems weird that Vader would be wounded during the events of the movie though, considering how unlikely it is that Vader needed a period of recovery between RO and ANH. However he might be introduced in the tank (implying some previous battle), or perhaps he is simply put in the tank regularly to heal.
