Let us not forget that there was a jet-styled bazooka in Maskman called the Jet Cannon, which replaced their former artillery weapon the Shot Bomber. Also I'm getting Arthur G6 vibes from this new weapon.

Well, I don't know about you guys, but when I first read the name Hakaizer, I immediately think of Kikaider and Hakaider... maybe I'm thinking of it too much, but I think it fits because zenkaiger (well, at least they didn't go with kikaizer, it would be too obvious) consists of mostly robots, and hakaizer is apparently a robot that was controlled by the tojitendo to destroy the Zenkaiger.

I'd say it is a mix of Hakaider and Bioman's version of Hakaider named Bio Hunter Silva.

This is going to be a very bad news for the other Super Sentai Teams that are still trapped in their gears by Tojitendo. So, with 5 months remaining, will the "worlds' liberation from evil" theme be materialized for the 45th Super Sentai Team or not? If not, it'll be too late for the 46th Super Sentai Team for next year.

Interesting question.
I think the Super Sentai Worlds thing are still for more climax plot.
Maybe in episode 40?
Really interesting if Barashitara are trying to make some of powerful monsters from trapped Super Sentai Worlds.

But, in spite of this worlds' destruction attempts by Tojitendo and its past villains, do you think there will there be a possible Kikai Sentai Zenkaiger Vs. Kiramager Vs. Super Sentai Team-up Movie when the former attempted to rescue the latter and the Showa, the Heisei and the Reiwa Super Sentai Teams plus AkaRed from these bad guys? I mean, liberation, and not destruction, of their Seniors is the main goal of the Zenkaigers. Poor Seniors! They've been puppet-controlled by the enemies!

Silva himself is a reference to Hakaider, so there is that!

Huh? Bio Hunter Silva of Choudenshi BioMan reference? What about Gran Neziros of MegaRanger? That was Dr. Hinelar's robot of destruction, but it and the Mega Voyager were self-destructed in the atmosphere, although the MegaRangers survived with injuries.

Man, the Zenryoku Zenkai Cannon did NOT look like I thought it would.

It's not really dropped, but moreso that everything else around it was altered.
Ninja Captor, alongside Gorenger and JAKQ, were considered "Sentai" while Battle Fever and onward were considered part of the "Super Sentai" series.

Fast forward 20 years of Toei waffling on whether Gorenger and JAKQ were part of the main franchise until they finally made up their mind. As a result, the Sentai trio that was a precursor to Super Sentai faded away and Ninja Captor basically lost all franchise relations :lol