While Weaving didn't clarify who "they" were, it's easy to understand why anyone — agent or Bay — may have wanted him on the project. Weaving not only has one of Hollywood's most recognizable looks but a distinctive voice that fans have come to recognize and celebrate. That especially holds true for his more villainous turns like Agent Smith and his Marvel villain, the Red Skull. So it makes perfect sense that Bay might want that kind of dramatic heft behind his rather imposing mega-threat, Megatron.
Unfortunately, according to the actor, Bay and Weaving didn't get much time together while he did voice work for the films. That was also part of why the role didn't leave any particularly distinct impression on him. "My link to that and to Michael Bay is so minimal. I have never met him. I was never on set. I've seen his face on Skype," Weaving said. "I know nothing about him, really. I just went in and did it."
In an even more shocking confession, Weaving told Collider that he also hadn't spent much time with the script before jumping into the recording booth. "I never read the script. I just have my lines, and I don't know what they mean," Weaving said. "That sounds absolutely pathetic! I've never done anything like that in my life. It's hard to say any more about it than that, really."
In the end, Megatron wasn't necessarily a bad role, just not one that was significant for the actor. "It was a two-hour voice job, while I was doing other things," he concluded. "Of course, it's a massive film that's made masses of money. I just happened to be the voice of one of the iconic villainous characters."