The phrase "all over but the shouting" suggests that a decisive victory has been achieved and the outcome is certain. Its antonyms would therefore convey uncertainty, ongoing struggle, or a lack of resolution. Some antonyms that come to mind include: "still up in the air", "not over yet", "a work in progress", "incomplete", "unfinished business", "ongoing battle", "uncertain outcome", "too close to call", and "undecided". These phrases imply that the situation is still evolving and the end result is not yet clear or guaranteed. By contrast, "all over but the shouting" implies that the outcome is already certain and there is no need for further effort or debate.