During the scene when all the Autobots are sent into space where the hell are the Dinobots and Skyfire?
I thought they wrote Skyfire out of the show at that point. As for the Dinobots i'd assume their still sleeping in their closet.
Both the Autobots and Decepticons had forgotten about the Dinobots so they were hanging out in that closet Wheeljack keeps them in. Skyfire had probably crashed in the arctic once more and the Autobots couldn't be botherd with digging him up again.
This is what happened to the Dinobots. Watch 1:20 and 4:45 YouTube - Transformers Parody - Megatron's Bastard Plan (Act 3 of 6)