The four year old trolleys are safe, they aren't going away. Their pass by the Tower is less than 10% of their route. They already pass by a half dozen other lands and structures that have nothing to do with 1930's Hollywood.
My point was that Tower of Terror at DCA can't really be seen and does little to intrude on most themed areas of DCA, it was just that short street build-up visual where it worked nicely with the trolleys. Now that short stretch of streetscape will look more funky Steampunk with the trolleys than 1939 Vintage.
It'll be weird but work in DCA, but would be horrible in DHS where Tower visually anchors a much bigger park area.
And the Horse Drawn Streetcars of Walt's Main Street USA don't just pass by a medieval castle, they also pass within yards of an all-plastic house commercial for Monsanto, a towering and fake looking Swiss mountain, an Oregon Trail log fort with Indian teepees out front, and a Polynesian-African Cultural Appropriation Mish-Mash Marquee with elephant tusks and flaming torches and an animatronic barker bird in a straw hat trying to convince you to buy an extra cost ticket to see a show, Presented By United Airlines DC-8 Jet Mainliners.
The horse drawn streetcars traveling around Walt Disney's Central Plaza of 1955-1966
had nothing on 30 yards of Red Car Trolley track passing in front of Mission: BREAKOUT in 2017.