I guess it has it's ups and downs.
On one side, you have everything in one place, but on the other hand, you might end up spoiling new players. For example there is plenty material analyzing the war and it's reasons. A war that comes as a big surprise at the end of AoA.
I remember how surprised and even shocked I was, when we finally made it to earth, only to see everything we hoped for going up in flames. Knowing up ahead that this moment would come, would have ruined any emotional impact of that moment, and being the backstory junky I am, I'm pretty sure I would have read all freely available stuff before playing, unless it came with a big fat spoiler warning.
Maybe you could split it in three time periods, so to say and advice the reader to only read each part after finishing playing through the previous chapter ingame. That way new players at least will only bring it down on themselfs, rather than accidentally spoiling themselfs.