Agreed 1,000%. As long as they keep their Planescape peanut butter out of my Spelljammer chocolate, we're cool.Spelljammer, because the only better thing than murder hoboing is murder hoboing iiiiiin spaaaaaaaceee.
And to judge from the spelljamming helm in Dungeon of the Mad Mage, they are planning to do just that. So I'm in!
Similarly, I have no interest in new material from more distinctive worlds like Dragonlance if they choose to genericize them by making them additional kitchen sink settings. People claim DL is cut from the same cloth as the Forgotten Realms and Greyhawk, but DL actually had a lot of important differences, mostly in what WASN'T there - like orcs and halflings, for starters.