The next Microsoft firewall solution.

I’ve been trying to do some digging but can’t seem to find anything concrete.

Typically, after the release of a new server OS, MS eventually comes out with a new firewall solution. Does anyone have anything solid on when their next release might be? Another ISA version, a merge of ISA and Forefront, or is Forefront going to replace ISA as Microsoft’s security solution?

Also, has anyone found any solid information on the capabilities and limitations of a potential release, I would appreciate any information that can be provided.