I am DMing a campaign in which the characters are going to begin shifting form plane to plane every few missions or so. I am considering dropping them into Athas (Dark Sun), but before I do I want to make sure that I don't get myself too far in over my head. The current party composition might be problematic in Athas (Sorcerer, Cleric, Arcanist, Warden, Rogue and Barbarian), but I feel like it might be an opportunity to explore the world for a few levels and create some interesting conflict in my overall campaign.
What should I take into account before I land my characters in the middle of Athas? I know many of their powers and weapons will be problematic so how can I do it well?