Board Thread:General Discussion/@comment-24277053-20140301135115/@comment-3974711-20140308144923

Ben and Kai never had a lost love. He curshed on her and she dissed that pretty quickly.

But that was 6 years ago. Given that we know that the future will eventually end up similar to what we saw in the original Ben 10,000 episode, there will probably be some call forward to their relationship.