Дата релиза ХСМ и Стартера

ХСМ -после или одновременно со стартером, дата пока не утверждена
Стартер - сентябрь и дата уже утверждена

via "to remain an anonymous source"
Chaos Space Marine codex is currently done are ready to be released in all regions.

The starter set is set for September and that date is currently locked.

There could be a codex release at the time of the starter set or just before it. This is still up in the air and not locked in yet