For the record, I watched this subtitled. I typically cannot stand dubbing, save for the trio of films I owned on VHS as a young lad (Lord Slug, Cooler's Revenge/Return, each helped by a more unique American score, IMO). I switched it to dub for just a moment to see the difference, and well suffice to say it's simply not the same film.
A rich egotistical "villain," an island fortress getaway a la Bond complete with army of mad scientists and bio-henchmen, a refreshingly mute Broli who for once doesn't pout on about crying Kakarot (WTF was ever up with that? Way to kill off the "Legendary Super Saiyan's" potential as anything but annoying, IMO), a killer absorbing Blob, unique cast of "heroes" who rarely if ever get to shine, a Battle Royale, human greed, extortion (of sorts, 18's repeated upping of price), and original finish to a film's villain (i.e., no ki beams or willfully spontaneous bursts of super-power here.) For me, each of these factors in to what I find to be the most underrated (quite literally, as per IMDb score) DBZ film. This has been my short review: feel free to stop here (if anyone reads this at all) as the rest is just more in-depth and my inability to stop/love for writing.
This is certainly one strange beast within the DBZ films, and only one of two movies I hadn't seen for some reason (Bojack being the other). Interestingly I found all the reviews relevant as it's apparent personal opinion plays a large factor. The film seems shorter than most, but I found this to work to it's advantage (short n' sweet as they say). The film largely removes Broli's demeanor or personality, but he never really had one to begin with. He's never really been entirely there to say the least, and really just relegates to pure, unintelligible evil/brute force. At least here he is treated with such, with literally one line of "Kakarot" as he dies - much better than the hundred fold repetitions of such incurred during his "Second Coming." I can see how this film would rank low among hardcore Broli fans, as has been said, but I admittedly am not. I enjoyed the first film, but it was over-hyped for me, even at the time of its release (the only DVD I actually bought, due to Broli's hype-in at the time), but "Second Coming" is my least favorite of the DBZ films (though I enjoyed the Goku/Gohan/Goten combo finale, which was much better than Goku's sudden ability to KO the UNTOUCHABLE Broli in his first film).
This film is an amalgamation of World's Strongest (Biowarriors/mad science), the Blob (or The Raft, if you'd rather), and the Broli films, all thrown into the World Games era of DBZ. It is the only DBZ film to feature a recurring villain for round 3. It is one of the few DBZ films to not end with the not lame in itself, but lame in severe repetition, "get tremendous power/energy from out of nowhere and utterly destroy villain bit" And it sports one of, if not the most unique cast of leads/characters, giving hitherto unacknowledged/under(improperly) used characters a time to shine/do something. Krillin actually does something other than a)charge villain in straight line, b) get smacked by said villain, and c)lament "Why does this only happen to me?" Even Mr. Satan does something, and with Android 18 (so refreshing to see her), his usual annoyance is undercut because she's about the only character who openly defies his B.S about being World Champ.
My favorite "Broli" film, and one of my favorite DBZ movies (ranking up there with Return of Cooler, Battle of Gods, World's Strongest, and Fusion Reborn). 9/10 on a DBZ movie scale, FOR ME.