I admit I was doubtful when some claimed they had spotted a sliver of Jimmy Smits in the Rogue One sizzle reel at Celebration, but now the man himself confirmed it – in a squirrely sort of manner – on The Talk:
So now we know: Bail Organa may appear briefly in Rogue One – assuming his shots makes the final cut, that is.
Smits played Bail Organa, the adoptive father of Leia, in Attack of the Clones and Revenge of the Sith.
The official site has updated their databank for ROTS with new information on Anakin, Padme, Obi-Wan, Bail, Palpatine and one completely new character. The entries themselves are fairly vague, but there are several new photos.