Bull! Season Three had some of the best writing(aside from...Wheelie

and even he wasn't that bad when he started hangin' out with Blur!) And I'm pretty sure Season Four was ended for artistic reasons. I mean they started a Golden Age of Peace,defeated the Decepticons,had a new supply of Energon. No offense but,you tell me where you coulda gone from there without seeming like your just trying to prolong the series for toy sales. I think there's a slim to none chance of a season five,but I think another seimi- sequel like Beast Wars or a japan-only G1 sequel like Headmasters.