I think Forest definitely has a chance against Silva, he brings something to the table that I don't think Anderson has fought yet. He trains at Extreme Couture so he's going to have a decent game plan, but all in all I just don't think Forrest will win.
Some people are saying Forrest should take Anderson to the ground, but does Forrest really want to take him to the ground? Anderson's black belt in BJJ will surely be a factor in Forest's game plan. If anything I think he'll fight a similar fight as he did with Rampage, I think he'll circle and look to connect with the jab and leg kicks. Maybe if he injures Silva he'll take him to the ground and look to finish, but somehow I doubt it. The ground is a dangerous place for anyone who fights Silva.