Ironhide exists on TF Prime, as do many others we want to see, they're just not present on Earth. A lot of people want to see Ironhide, so I'll be focusing on him. To completely forget about Ironhide, and say he doesn't even exist is des... des... despicable. Mostly every TF Universe has had the character, so maybe TF Prime does. Nah, he isn't present with the Autobot's, but he still has to exist, much like how Wheeljack wasn't present, but wipty damn doo he showed up.