the second episode of Gokaiger is good as well, and has a nice sort of "cameo" in it, explaining how Captain Marvelous (wasn't this always the parody name for Captain Marvel?) got the keys for the other ranger teams. and then there's the actor from Magiranger (good thing there are online places to find such things out showing up).
we get to see a lot of the toy, er, robot as well. I know why it's there, but hopefully we don't have to see it every episode. more fights are always better!
the story is not the same as Kamen Rider Decade, in that one hopes the sentai won't be battling each other constantly, and having the older teams "job" to the new one.