Steam or PS4?
If your on PS4 I'd wait until after the 22nd of May and check the reviews. There have been MAJOR performance issues on PC's with monster hardware. Hopefully the 22nd of May update will fix that.
If your on PC,
try it but remember the 2 hour gameplay refund rule.
There won't be any pre-order in the US on PS4. It's simply because Sony US and Sony Europe are two different entities and can act differently depending on the cases.
You'll be able to play May 22nd as everyone else though. Have a nice day!