Star Wars Rebels : Holocron of Fate : Obiwan Kenobi enters the show ?

Hello Rebels fans!

Episode 2 of Season 3 is already gone and we have a very interesting scenario in front of us !

I will not analyse the Episode in detail even if there is a lot to say about the renewed balance between Ezra and Kanan for example. But I want to focus on the last minute during which the 2 holocrons are fusing together and Maul and Ezra are having visions:

Maul says : I look for "Hope" and then "I see him", "he leaves"
Ezra says : "the twin suns" or "the twin sons" and then he speaks about various planets.

So question is Who leaves and give hope to Maul ?

Hope in the Sith way is to be able to get revenge or to get more power.
2 options :

1. Savage Oppress: Maul's brother (the "twin son"?).  From the Trailer we see a lot of Nighsister magic so Talzin, Savage Oppress... could be part of Season3. Savage was killed by Darth Sidious on Mandalor. Off course he could have survived like Maul did (perhaps thanks to the magic in his body). 
   
2. Obiwan Kenobi: Maul revenge over Kenobi who cut him half and made him become a crazy exiled mind on a junk yard planet for years...  Kenobi is on Tatooine : the planet with the "twin suns". Maul can get revenge over Kenobi by tracking him on Tatooine. The Light side Holocron even include a message from Obiwan Himself. 
3. Someone else?

It looks like the second option is more realistic. So unless you have other theories, there is a high probability that we will see Obiwan in Star wars rebels. Maul escaped in a beautiful Madalarian ship. Did he go directly to Tatooine ?

This is the planet of his very first fight with a Jedi, if it becomes the planet of his last fight the circle would be closed. 

Side Question: I ever thought that Maul wanted to use the Sith temple super weapon to kill Darth Sidious to have revenge on is brother and mother death. Was it that he wanted to kill Kenobi ?

Is that not a little bit limited ? Maul manage to take over Mandalor and several crime syndicates. He has the possibility to become very power full. He also claims to not be a Sith anymore but a new form of dark side force actor. So why this pursue of revenge on Kenobi instead of using his knowledge to lead part of the galaxy?

This characters seems to be doomed to fail over and over again in what ever he tries to accomplish...