Steve Stich states at today’s Crew-9 news conference that Dragon has a new contingency capability if all 4 parachutes fail; the SuperDracos will ignite prior to splashdown.
The Crew-8 return to Earth will also have this capability.
(He said this about 20 minutes after the start of the stream.)
Any video of them testing this? Sounds really cool
Not really. There’s a hover test vid uploaded in 2016 but they cheated. (It’s held up by a rope!)
Or you could play the first 17 seconds of the pad abort test in reverse …
Animation of a ‘land landing’: https://youtu.be/Cf_-g3UWQ04?t=1m32s