if Fox gets Hugh, Halle and someone more back, I highly doubt they only appear during 5 minutes on the movie.
They will use them for more than one scene, and Im afraid they'll even use Hugh in another one, we all know how they love him and the character.
The future sequences dont neccesary have to be as short as some think.
there should be a decent ballance, to tell a good story, both sides of the story, in fact, so it just deppend on what Matthew, Jane and Simon are more interested in: the character and plots on the past, or the future reality.