Previously, the renowned surveillance technology firm Flock had grand plans to embark on a massive mobile surveillance expansion endeavor. It intended to join forces with dashcam manufacturer Nexar to equip 350,000 Uber, Lyft, and food delivery vehicles in Georgia with AI-powered license plate recognition cameras (ALPR).

As per internal presentation documents acquired by media outlet 404 Media, this partnership was designed to metamorphose AI license plate recognition systems—initially installed on streetlight poles or at intersections—into an all-encompassing mobile surveillance network.

In the English-speaking business and tech context, when a company "embarks on an endeavor," it means the company is starting a significant project or initiative. Here, using "embark on a massive mobile surveillance expansion endeavor" instead of just "implement a large - scale mobile surveillance expansion project" makes the expression more vivid and in line with common English business and tech writing habits. Also, "join forces" is a more natural and commonly used phrase than "collaborate" in this context to describe the cooperation between two companies. And "metamorphose" is a more literary and descriptive word than "transform" to show the significant change of the surveillance systems.

Even though the collaboration ultimately fell through, it nonetheless exposed Flock's underlying ambition to convert ride-hailing vehicles into 'mobile cameras'.

In English, "fell through" is a very common and idiomatic way to say that a plan or agreement did not happen as expected. Using it here instead of a more literal description makes the sentence more fluent and natural for English readers.