Important note on the new seasons to keep worry at a minimum, and posts about seasons ending from flooding the sub
With season 2 starting today (April 15th at 1pm edt) I wanted to make a pinned post to clarify some things to keep anyone from worrying, and keep posts about it to a minimum. Season 1's pass will still be unlockable, and purchasable, as will all future passes after release until presumably the final days of the servers remaining active. You will be able to unlock past pass content, but you can only work on one pass at a time. You'll have to select which one you want to work on. A game that does this similarly is Super Animal Royale, where you can buy past passes and select which one you want to work on unlocking. Any questions can be left under this post as to keep the sub from being flooded. The community will answer if they know. So, tl;dr, no season passes don't expire, yes you can get everything from a past one if you buy it later, and you can talk about it here if there's anything you're still confused by.