Since I hope that there were 7 teams in Croatia, it's probably just my biased opinion to say that I would agree that the next leg is a TBC. I doubt TAR would try to squeeze in a flight to leave at night. They usually always leave in the day. Knowing that there is a U-Turn on this leg, replacing a yeild, it sort of supports a TBC. When there was a yeild it was usually a NEL. Thats not true north, take for instance season 9, Lake & Michelle yielded the D's and they were eliminated. True Eric & Daniele were saved by the NEL not TBC season 11, but the second time around they were yielded by The Chas and it was the Cha's that were eliminated that episode...thats just a few examples.
On the isssue of Yields and when their isn't a built in life line.
In the past lifelines for the YIeld have included severe bunching (4 hours to over half a day), non elimination legs, and TBC legs.
I won't talk about season 5 because they were in almost every episode (except the finale).
But there is a bit of a pattern, to most of the two yields.
1st yield-no lifeline in any form. Just one tasks between yield and elimination point.
2nd yield-A non elimination leg.
1st Yield ?
2cd Yield. no lifeline in any form just one task separates yield and elimination point.
1st yield-no lifeline in any form. Just one task between yield and elimination point (Sorry Tammy).
2nd Yield-A non elimination leg
1st yield-no lifeline in any form just one task separates yield and elimination point. (only team yielded that actually gets eliminated.
2cd Yield-non elimination leg
1st yield (while not shown was in one of the Vietnam legs. No lifeline. No idea how many tasks between yield and elimination point.
2nd yield-non elimination leg
1st Yield-no lifeline in any form though two tasks separate yield and elimination point.
2nd Yield-non elimination leg.
So there is a bit of a pattern. Typically the first Yield is an elimination leg. And its never been with a TBC leg.
Now with season 10 and All Stars, they have introduced a new twist that can negatively impact a teams performance. But in both instances it was on elimination legs.
So if anything, (and if the Yield is being fully replaced, as opposed to just adding more twists), then it would strongly imply that the first use of a tool to hold back teams will be an elimination leg.