Vin Diesel sent a ripple of excitement through the Marvel fanboys in Hall H just now at the end of his Riddick panel. He was asked about rumors he’s been tapped to join the Marvel universe. “It’s the one thing I’m not supposed to talk about it,” he answered. But then he let loose that “there is some very big news coming at the end of this month. … Poor Marvel.” Diesel recently sent out some cryptic posts that have fueled speculation. One of many rumors is he’s been tapped to play the Vision in The Avengers 2, but nothing has been confirmed. On July 9, he wrote this on his Facebook page, which has 44M likes: “Marvel meeting today. … Only the people in the room can tell you what was discussed. … P.s. Thanks to Our page, for pushing to make it happen… you know I get tunnel vision with my work… and after that meeting today… wow!” Marvel’s Comic-Con panel is tomorrow, but the studio is expected to hold its big reveals for Disney’s own D23 Expo in August.