Basically spoilers coming from the Part 1 preview. And it sounds like really bad fanfiction. It sounds quite horrifyingly bad if its true.
Edit: I have now read the spoilers from part 2 and if this is all true, it sounds like Rowling lost her mind by approving this. Apparently, Bellatrix and Voldemort had a child that was born before DH which makes no sense canonically and it just absolutely horrifying storytelling.
rave reviews from the PEOPLE who saw the play.which is far more important then reading half assed spoilers of the play on internet.
http://collider.com/harry-potter-and-the-cursed-child-reviews/
http://www.people.com/article/harry-potter-cursed-child-play-social-media-reactions
it makes actually a lot of sense why Albus is like that.the only Potter child in Slytherin.he doesn't want the Potter fame.he just doesn't like being associated with Harry at all bc Harry is all famous and heroic and he's the outcast who got sorted into Slytherin.the whole point of the play is basically that.
The time travel stuff.well I can't say I'm biggest fan of it,but when you think of it was it ever specified that time via the Time Turners was a flat circle, i.e. unalterable?
Dumbledore explicitly warned Harry and Hermione in third book to remain unseen so that they WOULDN'T screw up the past on par with a huge catastrophe. So that actually suggests that by using a time turner you can alter the past however you'd like, causing ripple effects and un-births and all other nasty crap.If it weren't even possible, Dumbledore never would have warned them to go out of their way not to be seen by anyone or do anything aside from their strict mission. I think that in this universe time is very alterable.
Albus and Scorp **** up so much stuff the first time they go back in time is because there is a time limit on the Time Turner (this is stated in the play) and messing with it is very bad.
and don't forget,there is still part 2 coming out very soon.