Apparently the Star Wars websites says that its set 30 years after the end of the Return of the Jedi whereas the Dark Empire series where Palpatine came back and Luke turned to the Dark Side was around 10 years After the Battle of Yavin (ABY).
But then again Jacen Solo turning to the darkside as Darth Caedus didn't happen until nearly 40 ABY as he died in 41 ABY on his flagship Anakin Solo after being struck down by Jaina Solo.
I can't seem to figure out what incident they're trying to show; from 25 ABY to 29ABY the Yuzhan Vong War raged on so the only logical conclusion could be that the film depicts either the Ssi-ruuvi invasion or the Dark Nest Crisis but even they don't fall very cleanly in the 30 year after bit...so I am at a loss to determine which is which !