A guy can dream can't he! But what I would really want is a show back on Cybertron, no humans or their shenanigans anymore.
If Transformers 5 comes out in 2016, and we assume Transformers 6 comes out in 2018...That's a seven year gap between the end of this trilogy and a possible reboot. Spider-man 3 and Amazing Spider-man had a 5 year difference. So best case, I guess we can expect one in 2023. But I doubt it'll come out that quick.
A petition won't do anything. Sales speak louder than words and they won't reboot it even if everyone only says bad things about the movie on the Internet