Originally Posted by Green Goblin
In an interview with Vin Disel he stated that "I had a meeting with Marvel, something really big
that people have been talking about for a long time, a merging of brands but I really can't talk about it now".
(link to the article, sorry for using IGN)
My guess, his role will be Thanos and the "merging" will be that of Spider-Man.
I'm hoping FF or Spider-Man into the MCU
Or Riddick into Cosmic MCU (GOTG?)