Next year marks the 20th Anniversary since the first Indiana Jones comic released from Dark Horse:
Dark Horse is doing something special for the 20th Anniversary of them holding the Star Wars comic line too so they could use next year to release some new Indy books as well if they wanted to.
Last year they relaunched their Aliens/Predator/Terminator comic books for their anniversaries as well.
The last Indy mini series (Tomb of the Gods) still outsold alot of the other Dark Horse books despite the long delays between issues. The DH/Marvel Omnibuses have been great but they are still slow dancing with releasing new Indy comic material these last few years.