[GoseiWonder]

I'd have Captain Mutiny be the main villian of Lost Galaxy with the plan of "hey look at that awesome ship! I could get a lot of space money for the resources you can ransack from it!" There would also be an offhand reference to Divatox once being part of Mutiny's crew.

Then I'd have it so Leo, Mike, Kai, Damon and Kendrix were a landing party sent to scout Mirinoi as a suitible Earth colony only to come across a temple with five swords. The party each takes a sword, with Leo and Mike sharing Red since Mike grabbed it first, and begins a quick inspection when Maya shows up looking more like Princess Mononoke than a bikini model from Conan the Barbarian.
She reveals herself to be an immortal guardian of the swords and pulls the last remaining sword only to be summoned up to Terra Venture to fight off Mutiny's Swabbies. She displays the skill of Morphing and instructs the other Rangers to Morph as well.
During the battle, Mike is "killed" and Leo takes over as Red.

The episode where they get the Galactabeasts happens when an angry Maya uses her guardian magic to try and open a portal back to Mirinoi when Mutiny attacks and disrupts the spell sending Terra Venture and Mutiny's dino castle into "The Lost Galaxy." Mutiny retreats to try and figure out just what happened when Maya says she senses "them." She then Morphs and hijacks a small ship to head down to a nearby planet. The Rangers then chase her and come across her stopping alien poachers with giant shipping containers who attack the Rangers because "she called reinforcements" but are chased of by the Rangers in retaliation. The containers contain the Galactabeasts and the beasts join the Rangers to thank them for their rescue.
The rest of the series pretty much stays the same save the last few episodes where Mutiny gets an ironic end by the very Starscreamish Trakeena, the general with a bug theme to replace Vilimax's Sentai counterpart because of the dirt bikes and pistols, as Trakeena uses an advanced mutation serum (she can do that because she's the one who made the PR version of the Balban X from Gingaman) to turn all the Swabbies into horrid bug/pirate mutants as she goes out to commandeer Terra Venture and claim it as her own for the goal of "make it my armed warbase for conquest of the universe."