Honestly? Fuck knows. We seem to be habitually late with our kit launches, with the exception of that one time we wore our seatbelt Under Armour shirt in the final game of the preceding season. The next year, we decided to release all three at the same time between the semi-final and final of the Euros.
If I had to guess, I think the Spurs hierarchy will be savvy enough to know that the fanbase could do with a small cooling off period after the final, and in an ideal situation would be unveiling the kit and our first signing simultaneously. As per usual with Nike, it'll be the home and away at the same time and the third in time for our first CL match (September?).
I also dread to think of all the kids who might have put 'Eriksen 23' on their 19/20 shirts if given the chance before today.