There's rumours saying that the new album will be a box of 3 CDs. One grand hits, one unreleased material and one new material. I really hope that's true. Anyway... Creed don't have enough songs to just do a album with just 4 more songs and then just oldies. Don't worry, they are going to give us some really hot stuff.
Can't guarantee that this rumours are true, I'm just a fan like you, but there is nothing wrong with hope and belive. I quote Mark Tremonti:
See... Mark, the guy who spent almost his whole vecation in the studio with SubmerseD won't let the fans down. And have you read the last INK magazine? It says that they really want to take the fan club to the next level.
Creed is up to something, 'cause I don't think that they really are going to break up after this. Mark wants to do a solo album, that's why Stapp couldn't sing on it, 'cause it would be Creed. And Stapp problably release his solo album so people won't forget him when the new singer is in.
But sure... There is a 50% chance that they will splitt up, but why would they want to take the fan club to the next level? Why did Stapp said in the interview with MTV that "This does not mean the end of Creed. Mark is working on a heavier guitar solo project, Flip plays a lot of golf and we still love each other very much".
They might take a break in a few year or so, but I don't think they really are about to splitt up.