Two ideas come to mind that would make compelling miniseries or movies if the script and direction were in the right hands.
--the Galveston hurricane of September, 1900 that killed more than 6,000 people. I can't believe it's never been put to film. They never did get an accurate body count. Galveston was a completely different city then. The storm and the subsequent discovery of oil in Houston in 1901 changed the course of the city forever. Galveston had more millionaires per capita than New York City in 1900. Beautiful magnificent southern mansions, racially diverse. Just beautiful. It was considered the Ellis Island of the Gulf. It had electric street lights since the late 1870s and great technology for the time.
It also had no sea wall and only sat 9 feet above sea level at its highest point. Issac Kline, the meteorologist that legend said saved the city, did no such thing. He didn't believe the storm coming was dangerous. He doubted it was coming at all. Issac's pregnant wife drowned as did untold thousands of others. It was a category 4 hurricane that hit a city completely unaware it was coming; the only train trestle that connected Galveston to the mainland was washed out by mid afternoon. After the storm and the discovery of oil in Houston which was considered safer because it was farther inland up the channel, Galveston ceased to be a cosmopolitan city of importance.
--an honest retrospective on the life of Theodore Roosevelt. A more contrary individual never lived. A conservationist at heart yet also someone who was desperate for war and combat. A devout family man, yet he left his infant daughter Alice alone for 2 years with his sister, Anna, because Alice's mother (also named Alice) had died from complications of childbirth and TR was too devastated to deal with his responsibilities. He would spend 2 years in the Dakota badlands even though he'd been the "soft" asthmatic child of an eastern millionaire. TR only brought his daughter back into his home when his second wife, Edith, insisted he do so after they were married when Alice was three years old. Then he never spoke a word about Alice's mother to his daughter--not ever. He'd named her Alice, but couldn't speak of the older Alice. She had to learn about her mother from her aunt, and Edith was fine with the arrangement because she'd been Theodore's childhood sweetheart and was devastated when Theodore had met Alice's mother and married her after he and Edith broke up. It was a twisted family history in the extreme and it's documented in several biographies. I'd love a SERIOUS treatment of the Oyster Bay Roosevelts. FDR and Eleanor were fascinating, but not nearly as twisted.