I hope the next book Omen By Christie Golden not being the lead in novel actually has some meat to the plot. The preview chapter included in the Outcast book hints at the return of the sith.

Will it explain the hidden Sith empire, I wonder if these are followers of Darth Bane or something else entirely.

It will begin to lay out how Jacen Solo fell to the darkside and Became Darth Caedus. Who Lumiya was working for or being used by, Where did Jacen Solo learn lost jedi and sith arts?

Are the Baren Do Sages and there secrets in any way connected to the sith, will anti jedi sentiment and Chief of State Daala a former Imperial Admiral lead to the second jedi purge?

When and How Does Fel set up the rival Imperial Academy of Jedi or the Imperial Knights.

If another war is brewing that the Jedi will be drawn into which Side will the Mandalores and Fett be on.