We know that the company has more than enough footage ready to go to marketing with, given what was shown at the D23 Expo and San Diego Comic-Con, and the third Thor movie does have a comfortable seven month distance from Avengers 3’s release date.
It’s possible that Marvel could wind up using the major release to really push Black Panther instead, given that it is the preceding title in the franchise, but could it be too much to ask for both?
Given the tension that exists between Marvel Studios’ film and television departments, it’s hard to imagine The Avengers: Infinity War being used to boost ratings for Inhumans or Agents Of S.H.I.E.L.D. – which means that the theatrical release of Taika Waititi’s Thor: Ragnarok makes sense as the earliest platform for the preview launch.