The Marvel logo shows, percentage loading completes, then the game just shows a two circle spinner logo on a black background.
Same thing on iOS.
And on Android
Servers down? Spinning circles. No way to finish the current event and doubtful on the start of the coming PvE event.
And that was the end and start of PvE for today. Not staying up to watch spinning 
. Bummer.
Spinning circles
Anymore this seems to be the norm. Roll out seasons that feel half baked or just rushed. D3 what’s going on?
Same here. Android.
Spinning wheel of doom. Can’t complete pve. Android. Occurred at exactly 22.00 UK time.
30 minutes of this so far.
Going on six hours for me in eastern U.S.
I played some matches earlier but i’m seeing this too now.
Ios not working for 7 hours now. Spinning red circles.
Try it now. A new data push (update) occurred 5 minutes ago.
Close the app and restart.
Working again, but PvE placement ruined of course.