On the other hand, Luke Gygax is a stand-up guy who has good direct relations with the community and WotC. I don't think Ernie Gygax presents a problem: being hard to sell in an elevator speech kind of does.Honestly...
As much as Greyhawk means, or meant, to D&D... at this point, Ernie's actions and TSR's situation make a Greyhawk update for 5e focused on what Gary Gygax made fraught with problems.
His eldest son's actions and inaction in relation to his business partner, who is currently going to court with WotC, really make it unlikely, I fear.
Outside of specific adventures, like Expedition, I wouldn't expect to see Greyhawk Support for a while.