But seriously, I hope we get some Ahsoka solo episodes about her quest to find answers. Interestingly, the episode after "The Lost Commanders" is "Relics of the Old Republic." Maybe Ahsoka is exploring some shit and finding ancient Jedi relics.
Possibly, or she'll visit some Jedi Temples, or other ancient sites. But I guess we can't really know where she'd be going unless we knew what questions she's looking for.
When she says she's going on her own because there are "questions that need answering", it doesn't necessarily mean the questions she's looking for are "who is the Sith Lord?" She may be looking for confirmation though, but I really doubt she's clueless on Vader's identity.
Freddy Prince confirmed in an interview that [SPOILER - highlight to read]: Ahsoka knows.
Also she wouldn't have a clue where Kenobi is, or that he's even still alive. I doubt they'll randomly bring in Tatooine Kenobi. Because once you bring him in it's going to be like, "why doesn't he help the Rebels, and help fight Vader?" Wouldn't make any sense.