both karen and arthur have confirmed they are coming back in Series 7 with Matt. But no-one is sure if they are going to be full-time companions या just appearing in half of the series या just a couple of episodes
I hope so, but I really don't think so. The Doctor left them in a house he gifted them after having destroyed Amy's faith in him, and then hid when he saw them in the mall... I don't think he's going to see them again... ='(
