Rossignolo, which is well known in his country, was trying to buy Bertone. He says he has some patents regarding aluminium space-frame technique, and this should allow him to build state-of-the-art cars with a fraction of the investments usually needed.
So he was trying to secure a brand for his products. The cheapest available was De Tomaso, probably worth close to zero. De Tomaso is still popular because of the PAntera and the Mangusta.
Honestly, I wouldn't bet a penny on Rossignolo right now. There's overcapacity in that sector, and I suspect his efforts are simply hopeless.