Mission Pass Season 5 contains a few items that were only previously available in Season 1!
I don't have a full list from season 1 (there was no announcement for that) but I've seen pre-PC players describing multiple items as being from Season 1. One that is definitely coming back is the emote 136: Air Guitar, which was originally Season 1 Tier 24 (Gold). I'll try to get more details later and update this OP.
GM Deynger, you sly devil! I saw you post this in one of the locked topics and wondered if it was foreshadowing something!
I'd like to ask that you take the most recent topic that is an offshoot of the original topic (that of whether content will return or not) to a new thread
Edit 1: Evolution Device: Dreamcast is back!!
Edit 2: It looks like gold tiers 7, 9, 13, 17 and 23 all have choices between cosmetics... it may be that one of these options is season 1 and the other is season 5. That could be... a really bad way to bring things back, forcing PC players to give up something new instead.
I hope I'm misunderstanding this. Or more realistically perhaps, since it is exactly 5 tiers, I hope those reappear in tiers 31-35.
Edit 3: It emerges that everything in tiers 7, 9, 13, 17 and 23 is from season 1. All groups for all of those tiers, as they are included in the overtime tiers as mentioned here.
Seems there's a definite dilemma in play here. The funny thing is if the pre-31 tiers on season 1 had this same dilemma, then this content returning is just as beneficial to Xbox players because they could not have chosen all the content the same way PC players probably cannot now, and this season lets them pick up the things they were forced to miss out on.
So... unless our tiers 31-35 are dramatically different, we're going to have to wait for a second season 1 re-run to be able to get everything. I hope I'm wrong. This feels like such a stupid way to handle a revival.
Edit 4: Beyond the possibility of being unable to get all season 1 items, it appears the Rose Saber weapon camo for swords is the only season 1 cosmetic that is not part of the revival. The Summer Festival Bow camo in tier 19 appears to be a dead ringer for the Kagiya Tsuzumi bow camo from season 1, and everything else is accounted for.