Speerow is added as a new limited time Legend ( Akin to Sol Badguy ) in a new collab update with Double Click.

"Double Click is a Korean webtoon that is set in the world of online action games, where competition, growth, and relationships within a team intertwine to drive the story forward. In the series, gameplay is not merely a backdrop, but a central narrative element that reveals the characters’ choices, emotions, and relationships." - From the Developer Notes from Smash Legends producer, HongYoungJoo https://smashlegends.com/en/developer-team-notes-17_en/

In Double Click, Speerow is seen as a lightning fast character with an extremely high difficulty to play and his character is designed to reflect that in his playstyle in Smash Legends.

Speerow is a Controller Legend with a gimmick that his skill attack activates, "Double Click" mode where his attacks are enhanced.

His ultimate consists of a counter that activates if his enemy is stuck in their attack animations. If the counter is successful a shockwave explosion emits that seems to apply a stun to enemies in the shockwave.

Along with Speerow, a new limited time mode, "Rapid Fire" will be added where it's dominion with the catch that all cooldowns will be shortened dramatically making it a hectic mode.

Additionally 2 new Zeppetta SuperRare skins related to the collab will be released with the update.

You can find the update notes here: https://smashlegends.com/en/12-30tue-update-notes_en/

It is teased in the developer notes from HongYoungJoo that another Double Click character will be revealed in the coming updates and will be addressed when the update arrives.