The Star Wars Books Facebook page lets us know that Star Wars Insider #147 (hitting newsstands next Tuesday) will include the prequel-era short story "Hammer" by Edward M. Erdelac. The announcement gives the following description of the story:
"Hammer" is a dark tale with Lovecraftian undertones in which a new Star Wars villain is born. On a remote world during the tail end of the Clone Wars, a troubled Padawan discovers an ancient Sith relic from the annals Old Republic history.Joe Corroney and Brian Miller will illustrate Erdelac's story. You can see one of their pieces by clicking the thumbnail above.
Lucasfilm's Jennifer Heddle Writing Star Wars Insider Short Story
John Jackson Miller Writing Kenobi Short Story For Insider
Christie Golden Writing Crucible Tie-In Short Story For SW Insider