Yes, That's A New Lefty Nueve. Cannondale Factory Racing is Racing Prototype MTB Fork.

A prototype inverted Cannondale Lefty fork called the Lefty Nueve is being used in racing, indicating it is more than a one-off development unit. The Lefty Ocho, an eight-generation model in production since 2018, has long delivered lightweight cross-country performance and has been raced at World Cup level for years with minimal change. The Lefty Nueve resembles the inverted Ocho but includes subtle refinements. The upper section is slimmer above the lower bushing and seal, with a smoother tapered transition to the widest point. The one-sided crown and steerer-to-headtube area also transition more smoothly, reducing a previously noticeable step thickness near the headset area.

"Yes, that is a new prototype inverted Cannondale Lefty fork, that we're going to call the Lefty Nueve. Details are officially non-existent at this point. But the Cannondale Factory team clearly has a new suspension fork at their disposal. And everyone is racing on it, suggesting this isn't just some one-off R&D prototype."

"The 8th-generation Lefty Ocho has been around for a long time - officially since 2018, so we're not too surprised that it was bound for an update. And based on Cannondale's previous Spanish naming scheme, we're going to dub this one Lefty Nueve because I simply like how that sounds. The Lefty has always been divisive, but love it or hate it from a design (or servicing) perspective, this one-legged fork has delivered top-tier lightweight cross-country performance for decades."

"Overall, Cannondale's prototype Lefty Nueve looks a lot like the inverted Ocho fork. But there are plenty of subtle differences that hint at improvements. First up, they've slimmed down the new upper. It is noticeably thinner just above the bulge for the lower bushing & seal. And then it features a smoother tapered transition up to its widest point at the top of the fork leg."

"There, it also transitions more smoothly through its one-sided crown up to the headtube. Before, there was about a ~2cm thick step where the steerer heads up into the frame, whereas now the crown looks to be as thin as ~5mm on the right side under the headset."

Read at Bikerumor