A union between Aragon and Ewoyn would IMHO be compeletely reprehensible, and would only make sense to a movie going audience that fails to see the big picture. What did Arwen do? How about making the decison to sacrifice her immortality, being in love with the leader of man and insuring the qualities of elves in some part remains in the line of kings, and thus in humanity. She bound her fate o the fate of Frodo, as
Tolkien tells us here:
"What is meant is that it was Arwen who first thought of sending Frodo into the West, and put in a plea for him to Gandalf (direct or through Galadriel, or both), and she used her own renunciation of the right to go West as an argument. Her renunciation and suffering were related to and enmeshed with Frodo's : both were parts of a plan for the regeneration of the state of Men. Her prayer might therefore be specially effective, and her plan have a certain equity of exchange." Letter 246 -
JRR Tolkien
Arwen essentialyy put herself into a matter that she did not have to. Ewoyn was fighting or her people who were threatened with extinction, Arwen by all rights could have sailed to the west and valinor from the very begining.
By accepting Aragorn it is said:
"her choice was made and her doom appointed" Appendix A,
The Return of the King - JRR Tolkien
The choice of Elrond's children:
"But to the children of Elrond a choice was also appointed: to pass with him from the circles of the world; or if they wedded with one of Mankind, to become mortal and die in Middle-earth." - History of Middle Earth XII,
The People's Of Middle Earth -
JRR Tolkien
Arwen's decison also compelte a circle, paralleling the same choice made by Luthien in
The Silmarillion. Such sacrifce is not common, and should not be underestimated for the sake of any "coolness".
Just my opinion, however
