Okay! Here we go. (Get ready, people. I have a huge wall of text to share)
Episode 1:
Gotta say, this was way better than I thought it was going to be! Can't believe there was some pre-determined negativity towards this.
My one complaint was that red ranger collage before the opening theme. The way the camera kept rapidly zooming out to show the next red ranger after the next was both painful to my eyes and gave me a little bit of motion sickness. If I had just picked one thing to focus on, either the subs or the visuals, I would have been fine. But trying to focus on both was painful...
After that, I can't compliment the premise of this show enough! I know everyone loves those "Who'd win in a fight" scenarios, but this it the first time I can enjoy one as an adult. Usually, those kind of stories are taken so seriously to the point where heroes are either fighting to the death or putting everything they have on the line. I don't like those set ups because no one really wins in the end; fans of both sides are forced to pick one, people that should be comrades end up ruining their friendships, and the real villains end up getting away because the heroes were distracted with in-fighting.
BUT HERE...!
The heroes, specifically Patran #1 and Zyuoh Eagle, recognize that this is NOT a fight to the death or anything. It's just a friendly sparring session to see who is the strongest. No negative consequences! The fans don't have to pick a side, the heroes aren't splitting apart, and any potential villains are not being ignored. Granted, the show can undercut this with heroes having a sit-down and talking things out instead. But sometimes that can be more satisfying than the tired trope of "Argh! I'm angry and I'm gonna fight you, even though this is all a misunderstanding that could easily be avoided!".
The Rita here is definitely not a Repulsa. If anything, she's an extreme opposite. Makes me wonder what her contingency plan is for Gaisorg or if that's just going to be part of a bait-and-switch reveal. Besides the two red I mentioned above, I like how the various Sentai heroes can just talk about things mid-battle and trust the winners to do what's right. This is what I'd expect them to do if the various Super Sentai through the ages have all met in some capacity and acknowledged each other as equal heroes. I know it's still up for debate whether or not all of Super Sentai exists in a shared universe or not, but if they do, stuff like this supports it. And I like how this special is making a prologue for Ryusoulger. They didn't have to do that, but they did, so that's gonna be cool.
Last but not least, I find it interesting that Over-Time has translated "GoGo Sentai" as "Rumbling Sentai". I can't help but wonder if they agreed that was the best way to translate it, or if they were just being a little lazy and went with the quickest/easiest translation option. Wouldn't be the first time they did something like that.