What is still in the Lore and what is retconned out?
In: Mic Turner and Meredith Argent are founders of the Alliance.
Probably Out: Meredith Argent was the head of a HUGE ship building enterprise AAAI based on New Rossyth in Alioth. (No sign of Alliance shipyards, or ships, but I really hope Frontier bring this back In)
In: Meredith Argent was the scion of old (industrial) money, her ancestors are mentioned in old reports of 'Caker Rebellions'. During the period she is involved in "Caker Cells" they receive massive funding. (Caker = old name for Alliance rebels)
Probably In: Mic Turner was killed in Plieone in 3252 (by INRA).
In or Out who knows?: His flight recorder pointed Polaris (now permit locked) as a system of interest.
Definitely Out: If you got Mic Turner's flight recorder, you could get a vaccine for the mycoid virus that INRA developed against the Thargoids, and by delivering it to Hotice and then Miacke you could get a Thargoid ship (from the Thargoids).
In: Mahon has initiated a Research project in the California Nebula investigating Fungal Growths (mycelium); giant pumpkins / Moth Eggs; crystal growths, telescopes and barnacles. If you scan ships arriving - there are slaves on board.
In: Mahon has that crazy ex-president of the Federation Jasmina Halsey as his "trusted advisor"
Worth noting: Every time Michael Brookes mentions the Alliance he drops the word: "Traitors" (to humanity, to the independents etc).
No sign of Alliance <> Thargoid interaction at the Pleiades.
Keep a look out in the California Nebula. - Watch for barnacles that move to "always ripe" cycle - it's the first sign of Thargoid activity.