The official Ride Storm community posted a 30-second Enduro Storm prototype clip on April 19, showing a dirt-bike-class vehicle bouncing over rough terrain with realistic suspension.
No release date was given. The community reaction was strong enough that the devs confirmed in a follow-up comment that Enduro Storm is in active development.
If you main off-road or dirt-bike gameplay, this is the update to watch. Until release, treat any 'Enduro' code as unverified.