Until they show something substantial, I'll keep considering Crackdown 3 to be on life support.
Consider: Including the teaser reveal back at E3 2014, we have literally seen only 19 minutes of any game-related content. The 2.5 minute pre-rendered teaser in 2014 and the 17 minute pre-alpha destructible environment tech demo in 2015. That's it. Over the last 17 months following that demo at Gamescom, there's been nothing shown, reported, said, displayed, announced, etc. about the game other than a brief note about not being at E3 2016 and moving the release date to 2017.
At this point, the fact that we don't know anything about, well, anything makes me pessimistic. By now we should at least have some idea of the single player and/or PVE co-op features and certainly more about the PvP features given how they have been touting the multiplayer destruction as a key selling point.
If it manages to come out at ALL in 2017, I'll be surprised.