According to the release, the cast attending the premiere include:
Christian Bale, Tom Hardy, Anne Hathaway, Liam Neeson, Joseph Gordon-Levitt, Marion Cotillard, Cillian Murphy, Morgan Freeman and Michael Caine.
The fact that Murphy is listed may give the game away that he could appear. In what form and for how long we’ve no idea as yet but not too long to find out. Could it be a flash-back, a cameo? It could just be that since he’s been in the first couple of movies that he’ll be popping along to the premiere but like I say, we’ll have to wait and see!
Murphy seems to like appearing briefly in these smaller roles teasing a bigger one as we last saw him do exactly the same in Tron: Legacy back in 2010.