The Planet of the theropods

Scenario: Billions of light-years away from Earth, in a location undetected by human technology, exists a unique planet named Ignisaleon. Its name is derived from the constellation Ignis, where it lies hidden, and Aleon, translating to 'of aliens' in the intergalactic language. About 50 million years ago, this lifeless celestial body suddenly burst into an array of living organisms morphed by an advanced alien race: the Thalusians. The Thalusians are an ancient race of extraterrestrial beings who've achieved the capability of manipulating time. Obsessed with the fascinating beauty and diversity of prehistoric Earth, they decided to recreate a similar life pattern on Ignisaleon. Disregarding the vast galactic chronos, they unraveled the threads of time and traveled back to Earth's prehistoric era. Thalusians harvested a variety of species of flora such as prehistoric plants, fungi, and fauna, particularly numerous invertebrates, fish, amphibians, and small reptiles. But what fascinated them the most were the creatures with gargantuan towering figures - theropods. They collected diverse samples of these magnificent creatures, including coelophysoids, ceratosaurids, ablalisaurids, and many more. After returning to their time, the Thalusians employed their advanced technology to terraform Ignisaleon. They used gene manipulation to ensure that the organisms would adapt well to their new home, and they filled the land, seas, and skies with species harvested from Earth's incipient stage. The terraforming was a success, and soon Ignisaleon thrived with life. The Thalusians enforced a strict non-intervention policy, allowing evolution to follow its course on Ignisaleon. The descendants of the transplanted organisms diversified into a myriad of species, most of which couldn't be found anywhere else in the known universe. Every mammal's and bird's niche became filled by the theropods, with some adapting to the land, others to the sea, and a few even occupying the skies. Their dominance over the entirety of the planetary biosphere led to the evolution of some truly astonishing species. For instance, aquatic theropods evolved into colossal yet graceful leviathans, ruling the deep oceans of Ignisaleon. Evolved spinosaurids and megaraptorans became the kings and queens of the planet's dense jungles. And some, similar to the troodontids and dromaeosaurids, developed intricate feather structures, enabling them to soar through Ignisaleon's sapphire skies. Today, Ignisaleon stands as a living testament to the grandeur of Earth's prehistoric life, its diverse theropod-descended species, and the Thalusians' magnificent feat of terraforming. At present mankind is ignorant of its existence, yet Ignisaleon silently goes through its natural evolution process, awaiting the day when another inquisitive explorer will discover its wondrous life.