Contents of the DVD are now known.

It contains six episodes, and for some reason it has the first episode as a "bonus extra"... while skipping episode 6.
Maybe the next volume will include it.

Episodes on this set:

Ep 1 - Family of Heroes Transformers Rescue Bots work with human first responders on an island that's also a high-tech testing ground.
Ep 2 - Under Pressure The Rescue Bots and the Burns work together when a volcano threatens the island of Griffin Rock.
Ep 3 - Hot Shots Dani gives Blades a new scoop claw to help on the front lines, but their sudden popularity threatens the team.
Ep 4 - Flobsters on Parade Chase, Blades and Boulder must battle a swarm of flying lobsters.
Ep 5 - The Alien Invasion of Griffin Rock Huxley Prescott causes panic when he reports that aliens have invaded Griffin Rock.
Ep 7 - Four Bots & a Baby The Bots are enlisted to watch after Doc Greene's Robo-Baby.

This is for an American release on October 2nd. Still no idea if it will be released here yet.