It sounds like Samsung is making big changes to the middle child in the Galaxy S family next year.
A new leak from WinFuture (via TechRadar) gave us some possible camera specs and other pertinent info related to next year's Samsung Galaxy S26 lineup, which has not been officially announced yet. According to the leak, the S26 Ultra will feature a 200MP wide lens and a 50MP telephoto lens, which is the same as what was on the S25 Ultra earlier this year. However, things really get interesting when the leak gets to the S26 Plus, which would be the middle of the three S26 models released next year if Samsung keeps up with what it has been doing for the past few years.
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Per WinFuture, Samsung is considering swapping out the Plus model (which is really just a bigger version of the base model) with the next super-thin Galaxy Edge phone. Samsung just launched the S25 Edge earlier this summer, and its extremely thin form factor gives it more of a distinct identity than any S-series Plus model has. Apparently, the middle phone (whether it's a Plus or an Edge) will have a new 50MP ultra-wide lens, bringing it closer in line with the Ultra models in that regard.
In summary, Samsung's not-too-cheap-but-not-too-expensive Galaxy S-series phone next year could have both a new form factor and a newer, better camera array. We will likely find out in January.