From information that has been gleaned from snippets in the forums.
There is a likelihood that avast will have a suite of firewall and anti-virus in the future, this is more for those people who are looking for an all in one package so they don't have to go searching around.
I don't know if this suit option would be paid only or not, but by all accounts there would still be the stand alone AV option and possibly the same for any avast firewall.