If that is indeed what Cumberbatch is hinting at, it’s hard to say when this might happen, though with Phase 4 looking to tell more cosmic stories, I wouldn’t be surprised if Kevin Feige and the other Marvel Studios bigwigs are interested in also having one or more of its protagonists either venture into another corner of the multiverse or deal with trouble that comes from one of these other realities.
Appearing on “Marvel Studios: The First Ten Years – The Evolution of Heroes,” one of the special features attached to Thor: Ragnarok’s home release, Benedict Cumberbatch touched on the MCU’s continuous growth, and with this franchise currently being 18 movies strong, he seemingly suggested that we’ll soon hit a point where some of the action will start to spill over into these other universes in a more permanent way.