navigating with a menu

What you're trying to do wouldn't work in principle even if you had a dc, since Rez.Layouts.loadFunctionOne(dc) (for example) returns a layout (array of Drawables), not a View.

I think you can accomplish what you want by creating View-derived classes which set their layout in onLayout():

class LoadFunctionOneView extends WatchUi.View {
    function initialize() {
        View.initialize();
    }
    function onLayout(dc as Dc) as Void {
        setLayout(Rez.Layouts.loadFunctionOne(dc));
    }
}

class LoadFunctionTwoView extends WatchUi.View {
    function initialize() {
        View.initialize();
    }
    function onLayout(dc as Dc) as Void {
        setLayout(Rez.Layouts.loadFunctionTwo(dc));
    }
}

// ...
// menu input delegate:
    function onMenuItem(item as Symbol) as Void {
        if (item == :item_1) {
            switchToView(new LoadFunctionOneView(), null, WatchUi.SLIDE_IMMEDIATE);
        }
        //...
    }