Actually, after doing a bit of research, there is a SLIGHT possibility it could be. I don't want to spoil RE 5 for myself, because I want to enjoy everything as I play it. However, here are some characters I know are in the game:
Chris, Sheva, Albert Wesker, Excella Gionne(Founder of Tricell, works with Wesker), Ricardo Irving(arms dealer and works as an agent for Tricell), the Plague Doctor(I have no clue about her, but apparently she plays a pivotal role in the game), Ozwell Spencer(He was a founding farther of Umbrella. He's only been mentioned in files in the old games, but apparently he makes an appearance in RE 5).
As for the woman in the stasis tube, no clue. Sherry Birkin, who was last seen in RE 2 as a 12-year-old....and it could be Jill. Your guess is as good as mine.