def apply_additional_updates(fig, updates=None):
    """
    Apply additional updates to a Plotly figure.

    Parameters:
        fig (plotly.graph_objects.Figure): The figure to update.
        updates (dict): Dictionary with keys like 'layout', 'traces', etc.

    Returns:
        plotly.graph_objects.Figure: Updated figure.
    """
    if not updates:
        return fig

    if "layout" in updates:
        fig.update_layout(**updates["layout"])

    if "traces" in updates:
        fig.update_traces(**updates["traces"])

    if "xaxis" in updates:
        fig.update_xaxes(**updates["xaxis"])

    if "yaxis" in updates:
        fig.update_yaxes(**updates["yaxis"])

    # Future: annotations, coloraxis, etc.

    return fig