With LOTR , Boromir is likely to gain the same cult following. The films will change this in a hurry. Aragorn will be the most loved character in the trilogy. He has the perfect introduction, and he constantly and consistently fills in for the missing Gandalf when needed. Movie-goers will eat this up.
People love to see an unknown suddenly appear and achieve greatness.
And Aragorn is such a wonderful character. Viggo is also a doll. The women will swoon over this guy. The men will love his toughness and sword fighting. The kids will get into how trustworthy and how gentle he is.