Which any anime shows that Adult Swim will have the rights forever?

Sorry ( I ) i think its bleach that will stay on forever

You forgot Bleach.

And there is no such thing as having "rights forever". They had to sign a contract with various companies and anime developers to receive the rights to air them on their channel, and no contract lasts forever.

Take, for example, toonami. They showed various anime such as Zatch Bell, Dragon Ball Z, Prince of Tennis, and many others. What did they do? They sold the rights to airing those animes to Hulu, completely erasing "toonami" from cartoon network.

More recently, Code Geass has stopped airing on Adult Swim. Although there is a chance it may return in a few years, the contract may have expired and Adult Swim does not have enough viewers of "Code Geass" to renew the contract anymore.

However, if I had to choose, it would be bleach. In a recent poll taken by Adult Swim on their website, Bleach won most views every week for the past 3 weeks, completely avalanching their other anime and various shows. Full Metal Alchemist Brotherhood came in second place.

...H?