What the main original villains were going to be in Transformers Robots in disguise

Beside Underbite,you're going to find out who were meant to be the original villains of Transformers Robots in disguise. Be warned as this was an original concept and it was not something like we saw in the actual show. 
So the original villains were not only Underbite but also Steeljaw and a familiar character. That familiar character you may ask is Grimlock. He was originally planed to be a main villain in Season 1 teaming up with Steeljaw. Like we saw in episode 8 of Season 1 but that would have last a couple episodes before Grimlock would join the Autobots. If you know what I mean right there. Strongarm was still suspicious of Grimlock's attitude,though. There's a reason why Grimlock was meant to be a main villain to begin with: A promo image of the series showing Steeljaw and Grimlock together. So the series would have started with the two pilot episodes like we got and having Underbite as the villain of the two episodes. However,Grimlock was'nt meant to join the Autobots at the time. He would have just escape,like he did in episode 2 of Season 1 instead and he would'nt be appearing for the rest of the episode. In a later episode,Grimlock encounter Steeljaw and joins him. He then spy on the Autobots by pretending to be one and when his mission failed,he meet up with Thunderhoof. A couple episodes later,Bumblebee convince him to join the Autobots. Grimlock agrees as he thinks Steeljaw is only thinking of himself. Then like we all know,Steeljaw's pack as we know it in Season 1 and of course without Grimlock and Minitron.