I can see a company providing 2.7 support afterwards. I'm not sure if RedHat, but if there is demand, I totally see 2.7 support as a viable business, at least for awhile.

I think it's unlikely that the community will bring support. Most of the community already jumped to 3.x, and those who haven't will do in the next two years. Also, supporting legacy code is not something that volunteers love to do.