first of all, calm down
second of all, the reason why this break between albums will be a little longer is that David is getting married - so he most likely wants to enjoy a few months of just being with Lena. Also, good thing for his voice.[You must be registered and logged in to see this link.]
watch the interview posted here
David is saying that until the next album there's going to be a while (and there WILL be a next album), also, as Disturbed, as a band, they have some projects in mind that they want to do and release till winter.
And he gets asked about solo projects and he responds that Disturbed takes all of their time so there's no need for anything solo - and also, that they work amazing together.
And David has said it himself in some earlier interviews (i think i've actually seen one a few weeks ago) that they are in it for the long haul, like GuiltyPleasures said.
So to answer your question - no, they are not.