Irving and Durant both are leaving the team surely as it seems. They have both wanted their trades as soon as possible. Actually Irving was closer to be traded but the team made a decision and decided to give priority to Durant's trade. I have heard that Miami Heat and Phoenix Suns are the teams Durant want to go now. As for Irving he has been likely to be traded with Westbrook. This deal would be great for Lakers but not much for Nets unfortunately.
Great news for the Heat if they got Durant, there can be an additional defense and offense for the team, I think the Pacers if the ones that will get Russell Westbrook and not the Nets, when the Pacers would get Deandre Ayton then they will likely be fixing the Russell Westbrook trade, so Brooklyn Nets will surely be a team with no all-star so that means they are OK with that,
As it was mentioned before, the Nets won't agree to trade Durant anyway if they don't get an all-star player instead of him. In that case, Durant trade rumors to the Heat seem unlikely since the Heat would have to include Butler and a couple of bench players in the deal. Honestly, I doubt the Heat have plans to trade Butler, and it's unlikely they could offer any other deal which would satisfy the Nets.