From the preview:
The howling whine of a speeder bike whipping between trees or across endless wastes of sand is an iconic part of the Star Wars saga—nearly as much as the whoosh of a lightsaber igniting or Darth Vader’s mechanical breathing. Speeder bikes have been used for transportation and thrill-seeking across the galaxy, and they also play a pivotal role in battle. Soon, you’ll be able to bring these lightning-fast speeders to your Imperial armies with the 74-Z Speeder Bikes Unit Expansion for Star Wars™: Legion!
Within the 74-Z Speeder Bikes Unit Expansion, you’ll find two unpainted, easily assembled 74-Z Speeder Bike miniatures, ready to add another unit to your army. One of the miniature sculpts is identical to the 74-Z Speeder Bike miniature included in the Core Set, while the other offers a variant design to add new diversity to the miniatures in your army. Like seven other expansions and the Star Wars: Legion Core Set, the 74-Z Speeder Bikes Unit Expansion will release on March 22nd, granting a depth to your army building from the very first day.
You can pre-order your copy of the 74-Z Speeder Bikes Unit Expansion and other expansions from your local retailer and online through our webstore today; then, read on for more information!
Source