Perhaps they should rather consider making the prequel.
"Brokeback, the early years". Let us know exactly what happened with Jack the summer of -62, for instance. There could be various premonition kind of scenes/dream scenes bringing J&E together.
And no, in case anyone thinks otherwise - I don't mean that. Any prequel *or* sequel would be sacrilege in my book. But I look at that iconic image of the two of them, close-up in the dozy, it's my screen saver still, and I think of how I'd love to see the two of them looking like that again.....
Hey, they should make a "In-the-middle-quel"!! Delving into one specific fishing trip and everything that happend. Perferrably pre-divorce timeline, when Jack was still so sweet and hopeful. Lots of things could take place with them there up in the mountains apart from the obvious ones.... a murder mystery, an avalanche, a volcano eruption, a plague of bears....
But whatever, we'd need quite a lot of scenes of the obvious events going on to get the context. Yes! this gets my vote!