The last we saw of Hulk in the Marvel Cinematic Universe, he was flying off to parts unknown in a Quinjet in the aftermath of the final battle in Avengers: Age of Ultron.
As things stand, it isn't known when or where he will return. Recently, it has been said that he won't appear in the next movie in the franchise – Captain America: Civil War – but we all know too well that rumours like that shouldn't necessarily be believed.
With that in mind, we have to start contemplating when and where he might re-emerge in the MCU – and that's exactly what we're going to do here.
So, starting with the least likely and ending with the most obvious, here are ten ways that the Hulk could theoretically re-emerge in the Marvel Cinematic Universe.
In theory, Hulk (or, more likely given the budgetary restraints of television, Bruce Banner) could re-emerge for the first time in one of the Marvel Cinematic Universe television shows.
It's very unlikely, but it could happen and Agents of S.H.I.E.L.D. seems like the most obvious one in which he might appear.
Phil Coulson's team do actively seek out individuals with superpowers and Hulk is indeed an individual with superpowers who happens to be currently missing – it would, therefore, make sense for them to be the ones who find him (and there's precedent for big actors not being averse to appearing on television – just look at Samuel L. Jackson).