^In general, they've varied their blocks quarterly and from year to year more than you're describing. None of those Sunday shows are regularly recurring in that particular slot from year to year, and they weren't displacing Westerns as you suggest.
That depends on which period of time you're referring to; some westerns were aired on Sundays, along with other, rotating genres. Yes, i know some of their blocks are quarterly, or if the interest holds like their "noir" block from a couple of years ago (Naked City, The Twilight Zone, Route 66, the B&W seasons of The Saint, etc.), or seasonal, like The Summer of ME. In 2014, I believe they temporarily ran Raymond Burr's signature series (Perry Mason & Ironside) back to back in the morning, however, it did not last long, and i'm sure if that was summer programming.
And it all depends on what programs they have access to and think people will watch. There are competitor retro channels.
Sure, there are competitor channels, but how many of the series I named in my earlier post are currently airing on other channels?
A couple years back they did have a Friday night slot dedicated to made-for-TV movies for a spell, which would have been perfect for something like those Marvel TV films. They aired the Wonder Woman pilots in that slot.
Did that include the Cathy Lee Crosby Wonder Woman TV movie?