An interesting supposition on the usage and power boost that Goku gets using Kaioken while he's already transformed into SSJ. It's a technique that comes from one of the better pieces of filler in DBZ. During the Otherworld tournament Goku put this technique on display against Paikuhan. So do you think if Goku used the Super Kaioken during his battle against Cell he could have finished him off? I think he would have burned out his body and Cell would have just regenerated even from a tiny piece of himself like he did when he blew himself up. So while it greatly boosts the SSJ transformation, it still doesn't come close to SSJ2. Gohan was an absolute monster like Geekdom says in his video.