What does Trek hide here? New Procaliber?

In the Val di Sole XCO World Cup, we have seen the Trek Factory Racing team riding what appears to be a new model of rigid mountain bike. But the curious thing is that they are hiding their central area, as if it had a rear shock absorber, so it seems that we could soon see a new technology.

Is it the New Trek Procaliber 2025?

When the trend of 120mm travel seemed fully established in XCO, Trek was the first brand to bet on a short-travel rear suspension that was much more reactive. This is how the Supercaliber was born, with which Jolanda Neff became Olympic Champion and Evie Richard won the World Championship. Time has proven Trek right, and now more and more brands have a model like this in their catalog.

But what we see now doesn't seem to be a new full suspension mountain bike. From the frame shapes, it seems that we are looking at the new version of the Procaliber or maybe a completely new model.

What is under that cover could be a new Isospeed system, the patented pivot by Trek that improved impact absorption in the rigid frame of the Procaliber. But thinking about that immediately brings to mind that Trek has replaced the Isospeed system with a new one before.

Yes, they did it on the road with their new Madone, replacing the Isospeed with a huge hole called Isoflow. A new system that uses a sophisticated frame architecture to provide greater absorption and traction.

Will we see something like this adapted to mountain bikes?