Renzo Gracie returned to action against Yuki Kondo in OneFC and in it he worked a takedown technique that he had demonstrated to Brandon Vera months beforehand. The technique is also taught by Ben Askren who calls it the Broomstick Mat Return, with the regular broomstick being a variation of the leg scissors takedown in BJJ.
In this video, I give a breakdown of this technique that Ben Askren says is unstoppable when performed correctly.
Ben Askren Broomstick Mat Return: https://youtu.be/H04jTuehY_8