It's too early to judge, Simmons will be playing next season, so most likely the Nets roster will improve having a healthy Durant and Irving. Maybe thats the time the Nets will be able to successfully trade Durant and Irving especially if the Nets will become the number 1 team overall.
Ben Simmons has not played since June 2021, and I have some doubts he will perform as before as he still has mental problems. So even if Simmons plays next season, it's unlikely that his presence on the court will improve the Nets' results in any way. In addition, there is still uncertainty about whether Irving and Durant will stay on the team or not.