I've got some thoughts on foreshadowing messages for a future expansion. Feel free to decipher and guess them.
"Their crusade shines across the stars. They will soon be here."
"The balance is broken. Now they seek to press their advantage. Your world is in danger. Let us help."
"Her heart is filled with zealous devotion. Her eyes burn with righteous fury."
"We could have helped you. We could have saved you. Now you are doomed. They will make slaves of you all."
"Even united, you will lose."
"One will force the other five into submission."
Hint: The Void is involved...sort of.