This is the time of year that everyone starts to speculate about the roster, it's still important to temper the expectations. In fact, it's even better to be able to separate what is plausible and not.
Every year this site is filled with joy at the possibilities of Player A being thrust out of his position by Player B. Then there are the guys that are eased back from injuries that are going to be world-beaters. What typically happens is that these matters take time and, almost always, some fans are disappointed by the results of week one.