That's still not convincing me that Marth's not in Brawl. Removing Marth from Super Smash Bros. Brawl is almost as bad as removing Ness (not because Ness was in all of the Super Smash Bros. games). Even if Marth and Ness haven't been in any new games recently (besides Marth's Fire Emblem DS Game) they're the first and central characters to their series. If either of them were removed their game series would be badly represented.

Also, Marth's Fire Emblem game being remade for the DS practically confirms Marth making it in. Ike having Marth and Roy's moves don't necessarily confirm that they're not making it in.