That's not a bad guess, but it kind of conflicts with the current storyline. Perhaps I should tell you this, Brigid...
[spoiler]Koga's gone. He joined up with the Inu gang for a short while, lost his shards to Naraku, and then left. He even gave up on Kagome, but did say that if she had problems with Inuyasha, she could come back to him. He has yet to be seen again.
As for Kikyo, she's dead...again. Based on the current events, I don't think they have any plans to bring her back.
Right now, Kohaku has the last Jewel Shard and everyone is trying to prevent Naraku from obtaining and corrupting it. He is currently traveling with Sesshomaru's group.[/spoiler]

