My first thought after reading that teaser was, "possible WaveCrest killers?" Then I remembered that the WaveCrests are front-ported, and will have more flexible mounting options. Still, the 6-element crossover design hints at capable tuning of a caliber similar to Dennis Murphy's Affordable Accuracy mods. Assuming the ELAC tweeters don't vary too far beyond spec, it seems Mr. Jones is cutting out the middle man.
I wonder if this answer's Chu Gai's question about why Jones left Pioneer? Maybe Jones is finally designing what he always wanted but Pioneer wouldn't allow because of production cost limitations.