Remathilis
Legend
If they can do Dragonlance without Weiss and Hickman, they can do Eberron without Keith. There is zero reason they would abandon Eberron.Considering the Eberron creator is stepping away from Eberron and DnD, I suspect the answer to that question is simply that Eberron will not appear again going forwards.
Similar to Dark Sun, WotC may just decide that the combination of themes they no longer agree with, a red-headed step child of a class they hate supporting, and the original creator leaving is enough for them shelve the setting for good.