Codenamed Aerodactyl, the Nothing Phone (2a) is expected to be a budget-oriented phone and the teaser is probably talking about a different rear camera configuration, which was leaked earlier. The main and secondary camera lenses are located more to the center back part of the phone.

According to Nothing, the new Phone (2a) will borrow some elements from the Phone (2), and represent a significant upgrade compared to the Phone (1), "on every front."

In any case, we'll know for sure when it is announced in March.