There's a 0% chance that happens. idk why people keep thinking it. There would be no worse press they could get right now than fucking over the air and travel expenses of like 40,000 of their most vocal and diehard fans and influencers.
I'd be shocked if the average expense for most fans is less than 1000 bucks for the weekend.
People who think it's feasible to scuttle BlizzCon on three weeks' notice quite obviously don't know the first thing about BlizzCon.
Blizzard's whole calendar revolves around it. Their marketing strategy is solely dependent on BlizzCon to the extreme that I would expect it to be seriously reevaluated for future years, now that it has been exposed as a vulnerability when an October surprise throws their whole company off-message. The last time it was feasible for them to bypass it was in 2012, and that was before BlizzCon became the grand finale for every single one of their e-sports initiatives to the point that that product launches and announcements don't even carry the weekend anymore.
If you're dissatisfied with Blizzard's conduct in the current fiasco, the imminence of BlizzCon is very much on your side. The time pressure it applies on them to do something, and do it halfway right (or at least not flagrantly wrong, as with their Friday statement), is considerable. It would be utterly untenable for them to weather the rest of this month in silence now that they've read the mood—which is not to say they aren't dumb enough or crazy enough to try it.
The employees in every arm, from software to e-sports, who work on producing the convention and ensuring everything goes on track like they've been planning for months—they must be furious.