I'll try to answer your questions.
#1-I don't think anyone knows what's up with Scott's weight problem, it could be a number of things. Who knows though, he's gained and lost weight like that before.
#2- From what I understand, Stapp is working on a solo project and maybe a book, and Tremonti, Flip, and Brian got together and have created a new band with a new singer. Something to look forward too
#3- Creed is pretty much broken up from what I understand. I wouldn't expect to hear much from Creed, but they do have a couple of releases scheduled this year.
Now this is just MY understanding of it all.