https://www.gamespot.com/articles/nintendo-dominated-twitter-during-e3-2018/1100-6459938/

According to Twitter, there were nearly 15 million #E3 tweets during E3 2018. The largest spike occurred on June 12 between 9-10 AM ET when Nintendo's Direct was airing. In that one hour, there were 890,000 tweets using the E3 hashtag. Most of them originated from the United States. Japan, the United Kingdom, Spain, and France followed.

With Nintendo's Direct dominating the charts, it makes sense that Super Smash Bros. Ultimate was the most tweeted about title. It was followed by Kingdom Hearts III, Fallout 76, The Last of Us Part II, and Death Stranding.