Star Wars Books UK is reporting that "Previews" Magazine is reporting that a new piece of Star Wars fiction is set to appear in the March issue of Star Wars: Insider, Issue #124.
This fits with the previous announcement that Insider would see a return of fiction content to its pages.
The speculation is that since no other Short stories have been announced and because it is close to the release date of The Old Republic: Deceived, that this would be the spot for Paul S. Kemp's as yet untitled Old Republic Short Story.