I decided to cap the future challenges shown in the intro credits:

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Episode 2 IC 'Smash and Grab' - there were only 10 or 12? around during Cook Islands, so there might be some form of twist to it: my guess is that instead of 3 people going twice, it'll be 6 going once, with 3 on the puzzle.

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Probable Ep 2 RC? All have the buffs they should so it's likely pre-switch (and since there will be more shots from it, it's probably very early. I think it's a challenge similar to the challenge in Exile Island episode 3 where they had to get the pillows, only this time it's in the water.

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Post episode-2? What the hell is that red thing?