Totally makes sense, it's the obvious move for Golovkin now. He's near the end of his career so he'll go where the money is at that's DAZN with Canelo. Plus even after the Canelo rematch if he wants to move up Hearn and Smith on DAZN makes perfect sense too.
DAZN is the place to go, honestly. They have Andrade, Canelo, they will have Jacobs after his last fight for HBO. Lemieux is likely to go there too, but his situation is different since he is only co-promoted by GB.