Former Sundowns midfielder Brent Carelse has noted how Rayners is now having limited playing opportunities after the arrival of Leon.
"Look, it [going to the World Cup] all depends if he's given the opportunity again [at Sundowns] and what he does with that opportunity," Carelse told Soccer Laduma.
"I think a lot of players at Sundowns know that's the case, you know. If you're given an opportunity, can you take it? And if you take it, will you remain there?
"So there's a lot of rotation. Yes, we understand they've got a big squad, but I'm sure the likes of Rayners and other players who want to see themselves at the World Cup would surely want to be playing as soon as possible."