So, last season start from early March and end in early June,
last 3 months.

Anyone got the info of when this season will end?
A reasonable guess would be around September 1 along with the point reset.

idk.... will there be a season gear update? (from S14 to S15)

I remember last time when Cata move to last season, there is a poll for season update.
But now I find few information relate to that.