Okay okay, I'll weigh in on who Dragotron is.
Basically, he both is and isn't Predaking. He is in that he fulfills the same role as Predaking, being the leader of the Predacons. But at the same time, he is not the same physical person as the Predaking character who appeared in season 3 of the Transformers: Prime cartoon.
See, the thing is, season 3 of Prime never aired in Japan, so those events technically never happened in the Japanese version of the show. Instead, a whole new backstory was created for the Predacons to explain their presence in the Transformers Go! cartoon.
In this version, after the events of TF: Prime season 2, the Autobots and Decepticons shifted their battles away from Earth into outer space, where Shockwave came along and then created the Predacons to help fight against the Autobots. But, the Predacons soon rebelled against the Decepticons, and hundreds of Preds scattered themselves across the universe. A certain group of Predacons, led by Dragotron, decided to go to both Earth and to specific locations in the universe aiming to invade them, but the Autobots and Decepticons soon followed the Preds back to Earth and succeeded in defeating Dragotron there. The used the power of a mystical object called a Legendisc to seal Dragotron deep underground, and then both Optimus Prime and his Autobots returned to outer space to continue hunting down the remaining Predacons throughout the universe. But, should the Preds who were defeated on Earth ever return, Optimus has tasked six new Autobots, who are the two Swordbot teams, to remain behind on Earth to protect the planet from the Predacons. The seal on the Preds was eventually broken and so the battles between the Swordbots and Dragotron's Predacons began anew.
As you can see, it's a very different backstory from the Prime cartoon version of Predaking (and the Preds in general). So, while Dragotron most certainly is not the same exact person as Cartoon Predaking, whether you want to see him as just another version of the general concept of TF: Prime Predaking (like how G1 Optimus Prime has a Sunbow cartoon version of himself, a Marvel comics version of himself, a Dreamwave comics version of himself, an IDW comic version of himself, and more versions of himself), or a new character altogether different from Predaking, is completely up to you.
(As an aside, TFWiki currently remains uncertain of his character status, for now keeping the info for both Predaking and Dragotron on the same character page until its ever decided to split the two.)
After all, the little pack-in storyline that comes in the instructions of every "larger-than-Cyberverse" Prime Beast Hunters toy also features a version of Predaking who is nothing like his Cartoon self, being a cruel, savage tyrant instead of the noble patriot he was in the cartoon, but is still considered to be a variation of the Prime Predaking character.
While I'm at it, I might as well go ahead and show you guys something. The following is a thread I created to help make things easier for people who wish to learn about Transformers Go!, and to help them keep up with it as well. There's a description of the series, a glossary of names and terminology, and links to English subtitled episodes all laid out for everyone's convenience. Check it out and see how ya'll like it. Here it is.