Any estimated time before this to come ? Since the latest update was pretty recently, I doubt that we will see something in the near future.
2016-04-15 - Bitcoin Core version 0.12.1 released
2016-02-23 - Bitcoin Core version 0.12.0 released
2015-11-13 - Bitcoin Core version 0.11.2 released
2015-10-15 - Bitcoin Core version 0.11.1 released
You can clearly see that sometimes the amount of time between minor versions is very short.
I think SegWit is a big deal. Why do you think it will be released during a minor version? It is the biggest change for many years.