What I want to see in the future is a sith event.. With Darth plagieus as the reward. Plagieus was Sidious' master until he killed him in his sleep.
It is known that Plagieus was studying life beyond death and midi chlorians before he was murdered. I believe that Plagieus is a dominant figure in the Star Wars saga and is mentioned many times in other Star Wars films/novels.
Imo he should be a Sith healer character with powerful revives. Firstly though.. Maul should be put in cantina shipments so that all sith can be farmable for a Sith 'training event' similar to the yoda one.
Same regulations would apply and only a team with 5 5* sith would be able to get him. There might even be a Sith 'starter pack' you could purchase from the shop.