I suppose they will give price and release date the 4th of june.
Depends on the ongoing game of chicken between MS and Sony. They each want the other to announce first to decide if they can break even or sell at a loss for competitive reason. They don't change the price after it was announced.
If one announce at 499 first the other have the opportunity to match it and not lose money, or go agressive with a lower price.
If one announce at 399 first, the other have the opportunity to either match it, or go 449 as a compromise to make it as close as possible without losing as much money (if they initially had 499 in mind).
If one announce 449 first, the other can go anywhere between 399 and 499 depending on how much they accept to lose money at launch, or how confident they are about their specific advantages.
But I can only see 449 or 499 as realistic possibilities anyway. 549 would be a ridiculous price, and 399 would be a massive loss on MS side (machined cast alu frame, big SoC, vapor chamber), and also quite a big loss on Sony's side depending on their target wattage and cooling solution. Neither have shown any willingness to lose more than about $50 per unit since the PS360 era.
(I predict that cast alu frame will disappear quickly, in favor of stamped sheet, as a silent revision)