In an article found on IGN Spain (and has since been removed), has been translated. The article mentions two modes:
Bandicoot Battle (Competitive)
Checkpoint Race – A competitive roundtrip series of races in which up to four players compete for the fastest time to each checkpoint. Whoever gains the most checkpoints wins. Your competitors will appear on the stage as ghosts to give you an idea of how you are doing.
Crate Combo – Score as many points as you can by breaking as many boxes as possible. The point value of each box increases for each box you break, increasing to up to 32 points per box. Break the boxes as fast as possible to maintain your combo before the meter runs out and resets the point value. The battle ends when you reach a checkpoint or die.
The second mode is called Pass N. Play (Cooperative):
According to the article this mode allows 2-4 players to switch their character around with one another as together ou progress through the campaign. Together, you can play the standard version of each level or the N.Verted modes which add obstacles in each level.
Lastly, we’ve had this confirmed previously but Flashback Tapes make an appearance in Crash Bandicoot 4: It’s About Time. These levels are throwbacks to the original levels that are unlocked by discovering VHS tapes hidden around each level. The one caveat is you’ll need to get to the tapes without dying. And then, when you do play the throwback levels, you’ll deal with some gruelling challenge chambers. The reason behind the tapes is that Dr. Cortex performed experiments on both Crash and Coco before the events of the original Crash Bandicoot game.
Crash Bandicoot 4: It’s About Time is set to launch on October 2, 2020 on Xbox One and PlayStation 4.