Any work on likely release of Adobe Acrobat 9?

I am ready to update my Adobe Acrobat 6.0 Pro version but since it has been a long time since version 8.0 was released, am concerned that I might buy version 8.0 and a few weeks later, version 9.0 might be released.

It seems like many companies have more or less regular releases up updated version so I assume that Adobe is probably the same.

I have no idea how often Adobe releases new versions of their software but if anyone here knows, I would appreciate an educated guess.

 

Well I can only say that I first had Adobe 6 on a laptop back in 2005. The current version is 8, so in three years, two major versions were released. That would come out to a new major release every 1.5 years.