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.
I've heard that Lebron would like to play with Irving but just as the trade, it's all the rumors that I've been hearing. Well, I guess that would just be another enjoying season for Lebron for choosing who he wants to play with.
As for the trade with KD, Nets really have to put priority on him as they've invested that much on him without getting that great return for his staying career on them.
Yes, this not really new because LeBron also asked the same thing last year and that is to have Westbrook to their team. Now LeBron is asking again to the management to have Irving in the team that's why the management is trying to have a trade for the Nets so that they can also free up Westbrook.
These things are still rumors until now but it is also saying that the Lakers is really convincing the Nets to give Irving, they are somehow close to having a deal.