Oubre is a UFA so this would have to be a sign and trade, thus hard capping NOP.  That may not be a problem, but a consideration.
As to NOP more in general, I don't get why they would trade Zion.  They have a really good core.  They have the ball handler (McCollum),  they have the wing (Ingram), and Zion is their big.  So you trade Zion for another wing and a chance to draft another ball handler?
Even if Zion is unhappy and asking for a trade, tell him he needs to get back on the court and confirm his value.  But I think aside from all that, they just need to get this core on the court together and see what they got.  Let Zion show/remind the league what kind of player his is.  Let him show everyone he really does love the game, is willing to work.  I think NOP will be good.  If it still doesn't work for whatever reason, then you can figure out how to blow up the team.