At this time, there is no known reset date. Because of this, I believe the season will move forward as expected, and likely see a reset in November or December.
Usually seasons reset every six months or around that. Seasons reset quicker if there is a broken economy and or if one team/player is way ahead of everyone else financially. Currently there isn't really any one island that is miles ahead of the rest of the server. Fair enough, tokens are worth a lot now and it is pretty hard to make profit off buying spawners but, that isn't necessarily classified as a 'broken economy'. The growth in the price of tokens was always going to happen no matter what so personally i do not see skyblock's reset coming any time sooner that expected at the start of the season. Just like Zonafer has mentioned, you should expect to see the new season of skyblock being brought out within the time span of, Late October - Early December. Thank you and have a wonderful day!
