Wrong-o, kiddo. It's a big misconception that clones were due to Sakurai not having enough time. It was actually do to him having EXTRA time. As the journal translation says, Sakurai unintentionally reached the number of characters he did. If it was unintentional, obviously he didn't have a number that he was required to reach.
He discusses this in the old Melee site in some of the clone's (or as he calls them "Model switch characters") profiles why they were chosen for Brawl. Star Fox was popular at the time, so he threw in Falco; He liked the Dr. Mario music so he threw in Dr. Mario; The team noticed that Ganondorf had similar body proportions to Captain Falcon and was popular so he put him in. It did not have to do with a lack of time. Feel free to read about it here:
http://www.nintendo.co.jp/n01/n64/software/nus_p_nalj/smash/flash/0222/character.html
It's extremely likely there will be more clones in Brawl, especially since he KNOW that they had extra time due to the delay. Although it was obvious it occured for the sake of not stealing SMG's sales, it gave them some extra development time. The time would not be sufficient to create totally unique characters, but it many be enough time for clones.