We already know that Tier 48 is the battlepass teaser for the next agent.
This is because of the pattern of the teasers in the battlepass so far.
Episode 1:
Act 1 : Tier 48 (KJ) Act 2 : Tier 48 (Skye) Act 3 : Tier 38 (Yoru)
Episode 2 :
Act 1 : Tier 38 (Astra) Act 2 : ? Act 3 : ?
The pattern seems to be going by groups of 2, so 2 48s, then 2 38s, and the 38th card in this new battlepass is a frenzy card, so tier 48 has to be it.

So we know that it's called "Lost at Sea?"
However, keep in mind that the card is posed as a question, as if someone was asking if you were just floating around on a ship, or "Lost at Sea?"

So clearly, the ocean is important to the new agent in some way. I believe this because all the other cards have been named as general nouns or concepts, like "Secret Lineage." This is the first time a teaser card has been a phrase someone is saying.

We can also find 1 other sea-related item in the battlepass, although their importance or relevance to the next agent is just pure skepticism at best.

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Correlation? Probably not. But that's the only stand-outish seafaring theme I can think of. Especially that rad hat, and oddly artificial looking feathers.