I highly doubt it since the Earth War Trilogy is a direct sequel to ALIENS so essentially the Earth War Trilogy was ALIEN 3 before ALIEN 3 was made.
Having the setting on Earth back then made sense because it was after Ripley discovered the xenomorphs, after she told the ICC and Weyland Yutani corporation of her encounter. So it was an escalation of the metaplot.
Here where it is set before Ripley's encounter make no sense. If xenomorphs were already on Earth two years prior to Ripley's encounter why didn't they procure a specimen? If the xenomorphs were on Earth, there was no need for Lv-426, no need for Hadley's hope and no need for Ripley's personal vendetta against the xenomorph because her entire journey is render moot!