I'm just gonna post what some people I asked about the timeline (mainly a discussion between me and Militades at TG Forums
The game should be set somewhere in the old republic era. Which covers from about 10,000 BBY and somewhere in the 3,000 BBY. Basically the end of the Infinite Empire Era to about somewhere after the end of the First Jedi Purge (which was the time period before the events of TSL. That was when Traya, Sion, and Nihilus went on the hunt for the Jedi).