Based off that screenshot from the promo, which is assumed to be that of the second immunity challenge, the following people are guaranteed to make Top 17 (Episode 2/second half of Episode 1):
TOP 17 Confirmed: Will, Hali, Joe, Jenn, Vince, Mike, Lindsey, Sierra, Rodney, Kelly, Max
People MISSING/UNACCOUNTED for in the photo: Nina, Dan, Tyler, Joaquin, So, Shirin, Carolyn
The White collars are very blurry but it appears that So, Shirin and Carolyn are around Max.
People COMPLETELY missing in the photo: Nina, Dan, Tyler/Joaquin
No Collars were spoiled to win first immunity so Nina is 100% safe, and likely sitting out in that challenge.
Top 17 Confirmed: Nina (100%), likely So, Shirin, Carolyn
THIS MEANS EITHER......
A) Blue Collar loses first immunity. Dan is first boot, while either Tyler or Joaquin sit out for White Collar in second IC.
B) White Collar loses first immunity. Tyler or Joaquin (likely TYLER) is the first boot, and Dan sits out for Blue Collar in second IC.
WannaBeeFriends Well based off post-show pictures with minimal weight loss/no tan, Tyler was already speculated to being out early and this might confirm it.
Either Tyler, Dan, Joaquin, So, Shirin or Carolyn are first boot. The white collars are very blurry in that image but Tyler is nowhere to be seen unless he's in the water or sitting out, and I doubt he would sit out.