Well, just a few days ago, I saw a commercial on Cartoon Network for Xiaolin Showdown, which to this point has been one of the few shows that Kids WB has kept since dropping more half of their standard lineup several months back. Yu-Gi-Oh! is ending - but its counterpart, Yu-Gi-Oh! GX, is shown on CN - and older Pokemon episodes have been shown on CN for years now.
With that on top of the amazingly poor job that's being done in updating the Kids WB website (for instance, Yu-Gi-Oh hasn't had an episode for quite awhile, so its section of the Kids WB site automatically reminds viewers about the new episodes that just happen to have the titles of the upcoming episodes of Johnny Test), I'm starting to wonder if the WB is making a move to drop the rights to its "younger audience" shows in preparation for the merger.