In the Fall of Cybertron game, the dinobots were created on Cybertron millions of years before the war on Earth. In G1, the same Dinobots were made on Earth, but no matter what continuity you go by, there were already dino and beast bots way before the Beast Wars characters timeline, which is roughly 300 years after the Great War. Although in the first episode of Beast Wars, the bots seemed new to their beast bodies and even their names, I assume that was just something the writers didn't think out well. They were already maximals (like animals) and Predacons (like predators), with the symbols of a cat and a bug, and normally a new form doesnt change a transformer's name, even after millions of years and lots of body changes. I have never seen good reason to assume the Beast Wars characters were ever cars or jets back on Cybertron, but most custom figures of them in cybertronian forms, and even a comic book I read, depicted them as vehicles. To me that just doesn't make a lot of sense. The point is- The Predacon rogue from cybertron known as Megatron, descendant of the original Megatron, could have easily had a T-rex-like beast alt mode before the crash on earth. That's why I am calling this Pre-Beast Wars Megatron's cybertronian mode. Yeah,I know... "Why would Megatron take on a T-rex form on Earth if he was already a T-rex?" Easy to answer though. They had to take on new beast forms with organic living tissues covering them for protection from the enegon build up issue. I kept his colors roughly the same as his first T-rex form on earth (BW S1), explaining why he was a purple T-rex in BW, and for nostalgic purposes. To me, this figure has always struck me as a cybertron form. I enjoyed fleshing out that idea a bit more here. The plan was to make him look as factory as possible, but I did end up giving some areas a bit of ink washing to bring out details. All ugly screw holes were filled before painting.