There may not be a BlizzCon this year, but there will be a gathering for all things Blizzard in the future. Today, Blizzard announced BlizzConline, an online Blizzard event that will "channel the spirit of BlizzCon into the form of an online show."
Taking place from Feb. 19 through 20, 2021, BlizzConline doesn't have too many details yet. There are a few Blizzard games in development right now, including Overwatch 2 and Diablo 4, so it's likely we'll hear something about those.
As for what is confirmed, the BlizzConline site details a few events centered around a Community Showcase. Contests and exhibitions for cosplay, art, and digital storytelling are all planned, as well as a "Talent Spotlight." Participants are allowed to submit videos of themselves "performing, singing, dancing, or doing whatever it is you do." Not sure what that has to do with Blizzard, but it's there.
BlizzCon 2020 was canceled earlier this year due to concerns over the global COVID-19 pandemic. A number of the usual gaming events scheduled for this summer and fall called off their public, in-person events. Those big conventions were instead replaced with a flood of online streams as companies rolled out their next-gen plans.
At the time, Blizzard estimated it would be holding an online event in place of BlizzCon 2020 sometime early next year, so things seem on track. How a fan event of this size translates to an online forum, as well as how Blizzard handles its big reveals and usual keynotes, will be interesting to see.