Found this while browsing the JB HiFi website, the first DVD of Robots in Disguise season 3 came out this week.

Would guess there will be four in total, maybe five.

Description from the JB site:

Bumblebee, still relaxing after the Autobots’ triumph over Starsceam, feels his team can tackle any issue that might come up… but the Bee Team unprepared when they face a Stunticon that proves more formidable and crafty than they anticipated!

Later, the Bee Team discovers a mysterious artefact that has a strange effect on Cybertronian minds, turning the bots against one another! Can the Bee Team get it together in time to keep obsessed treasure-*‐hunter Springload from accidentally destroying Crown City?

Episodes:
King Of The Hill - Part 1
King Of The Hill - Part 2
Defrosted
Blurred
Sphere Of Influence
Bee Cool