For what it's worth, this movie can be enjoyable. Much like the TV series, you have to take this movie with a grain of salt. Don't expect to much and you won't be disappointed.
The special effects for this sequel do not come close to those of the first movie. The Turbo Megazord kind of looks like a few rejects from the junkyard got together and walked out. And the scenes of the lava pit in Maligore's will remind you of one of those bad B-grade TV Sci-Fi series that were prevalent during the 60s and 70s.
One of the bright spots of this movie is Divitox, a new evil villaness played deliciously over-the-top by Hilary Turner. Never taking herself too seriously, Ms. Turner camps up Divitox just enough to make us almost want to route for her to win. Hands down, Divitox is the best villaness (or villan for that matter) to hit Angel Grove in years.
Fans of the TV series will appreciate the fact that this movie picks up roughly where the series ended the season, and the series picks up roughly where the movie ends. This is contrary to the first movie which had nothing to do with the TV series except for the fact that it was about the Power Rangers.
As I stated earlier, don't expect much and you will be able to enjoy this movie. It can be a lot of fun, and all the action in Maligore's cave at the end of the movie is well worth the pain it takes to get there.