“There’s always a little bit of truth in legends,” Ahsoka once said on “Star Wars: Rebels.”
That line was a little Easter Egg to fans to assuage them about how the pre-Disney takeover “Star Wars” stories — told in decades-worth of novels, comics, and video games — might still live on in the official canon. It also applies a bit to the show “Star Wars: Underworld,” George Lucas‘s ambitious, but ultimately scrapped live-action TV series he was developing in the years…