Have not read all comments (comments are sometimes as good as listening to Grace), however, I think Covencraft says it best "OK people just calm down". In the end, we who are fans, will go to see the movie and will leave saying we really enjoyed it or it was good, but not as good as ..... I'll be really disappointed if I say I hated it.
With the introduction of Renner in Protocol I immediately said to my son that he was the future replacement for Cruise. First watched him in Hurt Locker and last saw him in American Hustle and enjoy his on screen performances. However, if a replacement, they best act quickly as he too is aging.