The brothers shot down that notion, as well as the fact that their story hinges on the kids of the series remaining the cute little children we see on screen.
The question, which was asked by THR, was preceded by the Duffer Brothers dispelling a rumor that Stranger Things had plans to film Season 3 and Season 4 simultaneously.
Even if they were trying to do that, Ross Duffer notes it would be a fruitless effort as he notes the children are seen growing throughout the course of the Season 2 episodes.