On another matter, when is it determined which players get the extra turn, at the nominal game end or when it would be their Fleet turn? Possession could cause a player to buy Fleet after "game end" but before it would be their Fleet turn.
This was actually answered up-thread. You could also take a look at the document in my sig for the complete rulings about Fleet.
(Sorry, for necroing, didn't read your answer before...)
Unfortunately I can't access it since I don't have a BGG account.
I also can't find an answer to my question in this thread - you've only discussed what happens with Possessions/Outposts played at the end of game or in a Fleet turn. I was asking about the inverse situation - what happens if one player only buys Fleet "after the game ends" during a Possession or Outpost turn (which does happen because another player did buy Fleet before, as discussed above). E.g. as follows:
Player A has already bought Fleet, player B hasn't. Player B "ends" the game during his turn, in which he's also played an Outpost. So due to A's Fleet, B does get the Outpost turn (that much is clear form the above), and buys Fleet in this Outpost turn. Does B now also get an extra Fleet turn after A or doesn't he?