O que é essa enorme criatura alada de morcego?

De acordo com a StarWars.com, É Gorgara. (ênfase minha)

There are some new creatures introduced in the trailer, and in proper Star Wars tradition, they’re big. Very big. The bat-like chirodactyl is known as “Gorgara,” it was revealed today. And Cal’s joyride on the creature — and later battle with it — seems like some instant-classic Star Wars gaming.
_{source: 6 Highlights from the new Star Wars Jedi: Fallen Order Trailer}

Quirodáctilo é a espécie da criatura. Gorgara seria o nome dado a essa criatura individual.

Chirodactyls were a species of winged carnivorous creature. One chirodactyl known as Gorgara became infamous within legend.
_{source: Chirodactyl}

... e do banco de dados de Guerra nas Estrelas:

Local legends tell of a fearsome winged beast that scours the deepest crags for prey, latches onto its target with a fierce grip, and soars to dizzying heights on powerful wings. This apex predator is known as Gorgara "the winged daemon of the canyon," and she will deceive her prey before attacking.
_{source: Gorgara the Chirodacty}

O sexo relatado por Gorgara é feminino.

_{O primeiro artigo vinculado foi escrito por Dan Brooks, estrategista sênior de conteúdo da Lucasfilm on-line e editor da StarWars.com.}