first group in qualifiers - South Africa, New Zealand, Philippines, and group host Australia. The article I was reading said mlb.com is streaming all of the 6 games, and 4 of the 6 will be on MLB Network. The other 3 qualifying groups will play over the next month or so, and the main tournament is next spring. I imagine most if not all of the qualifying games will at least be streamed, and I'm sure all the 2017 games will be broadcast somewhere.
I quite enjoyed watching 3 years ago as well. It IS pretty tough on the major league players who decide to participate though. Having to shorten your recovery in the offseason, especially if your team was in the postseason the previous year, really wears the players out. Still, cool to see nations compete.