Well. One way would be to create a fog and a text object. Keyframe scale changes, smog going big to small, text the other way. You could throw in modifiers on each object as well, if you like, although the modifier selection for the fog is considerably smaller. You also have a lot of parameters you can play with in the modeling room for the fog, not to mention transparency for the text. Carrara is very good with this kind of thing. Play around with it. Almost unlimited number of combinations you can use to get a nice result.