Segwit was merged into Core already. There will be a point release after 0.13 which enables it. You can read about the plan for segwit deployment here:
https://bitcoincore.org/en/2016/06/24/segwit-next-steps/The HK "consensus" was a farce signed by only a few developers. Nobody that wasn't there has any intention of following through on it.I know of no hard fork proposal that could achieve consensus on that timeframe, no.
Maybe a magical fix-everything solution will be invented tomorrow (it's possible), but even that would require 6+ months of effort to get it in Core, and another full year or more to deploy, since we're talking about a hard fork. So the timeline doesn't make sense even if one assumed there was an acceptable solution
(there isn't).EDIT: The devs that signed the HK document aren't liers. They promised code availability 3 months after, which is when I would start the timeline I described above.