Steam is getting proper season passes support, all DLCs must be listed with expected release dates. If DLC is cancelled, refund for the value of unreleased DLC will be offered.
More here: https://partner.steamgames.com/doc/store/seasonpass
A game can both be complete and have expansions later. While it is true that many games strip what seems like core content off the main purchase to sell it separately as DLC, there are many examples of DLCs expanding upon an already finished game.
A game can both be complete and have expansions later. While it is true that many games strip what seems like core content off the main purchase to sell it separately as DLC, there are many examples of DLCs expanding upon an already finished game.