I think I like your villain idea.

But the rangers I'm thinking that their DNA represents their historical figures as they're descendants.

Think from Ghost's Eyecons.

About Historical Figures-themed Super Sentai, I think:
- The Red Ranger based on Oda Nobunaga
- The Blue Ranger based on Napoleon Bonaparte
- The Black Ranger based on Albert Einstein
- The White Ranger based on Joan of Arc
- The Pink Ranger based on Empress Xiao
- The Gold Ranger (Sixth Ranger) based on Alfred Nobel

Additional Rangers:
- The Cyan Ranger based on Cleopatra
- The Green Ranger based on Shaka kaSenzangakhona
- The Two Purple Rangers (male and female) based on Pierre Curie and Marie Curie
- The Two Brown Rangers (both males) based on Wright Brothers
- The Silver Ranger based on Octavianus Augustus
- The Grey Ranger based on Mary Shelley

And their Mecha has time travel ability and has humanoid body just like five main Majins from Magirangers. Each mecha also based on Historical Figures

I like it.

But what about this?

- Red Ranger: DNA from warriors - samurai, knights, pirates & ninjas. Like Miyamoto Musashi, Arthur Pendragon, etc.
- Green Ranger: DNA from archers & gunslingers - Robin Hood & Billy the Kid
- Blue Ranger: DNA from inventors - Isaac Newton & Thomas Edison, etc.
- Yellow Ranger: DNA from artists - Beethoven, Leonardo Da Vinci, etc.
- Pink Ranger: DNA from history's females - Himiko, Empress Xiao, Florence Nightingale, Joan of Arc, etc.
- Metallic Ranger: DNA from novelists & storytellers. Like the Brothers Grimm, Mary Shelley, Bram Stoker, Arthur Conan Doyle, etc.

Evil Rangers:
- Black Ranger: DNA from kings & conquerors. Like Nobunaga & Tutankhamen.

The zords can be humanoid.

Thats really cool too.Hmm..sometime remind me to Gokaiger but in this time, use Historical Figures powers...

For mecha, I think the mecha should has five different modes (Red, Blue, Green, Yellow, Pink, etc) when they combined just like Time Robo Alpha Mode and Time Robe Beta Mode from Timeranger....

Well....

Red (Warriors - Swordmasters)
- Akechi Mitsuhide
- Miyamoto Musashi
- Arthur Pendragon
- Benkei

Green (Shooters - Gunslingers/Marksmen/Archers)
- Robin Hood
- Billy the Kid
- Saiga Magoichi

Blue (Inventors - Scientists)
- Isaac Newton
- Thomas Edison

Yellow (Artists - Musicians, Painters, etc.)
- Jimmy Hendrix
- Beethoven
- Mozart
- Leonardo Da Vinci
- Michelangelo
- Van Gogh
- Houdini

Pink/White (Strong Women)
- Joan of Arc
- Nohime
- Himiko

Metallic (Novelists)
- Mary Shelley
- Arthur Conan Doyle
- Brothers Grimm
- Rudyard Kipling

Black - evil and anti-hero (Conquerors)
- Oda Nobunaga
- Tutankhamen
- Ramses
- Caesar
- Vlad the Impaler
- Genghis Khan

Think of the black ranger as a mix of Wolzard, AbareKiller & TimeFire. He can use to be a former lover of the pink ranger.

The zords of the rangers would be like the Magiranger's zords mixed with the Time Flyers.

Would you all see all the rangers as time travelers? Or one of them from the future meeting four rangers from our time for help?

Another technological sentai with Space motif like megaranger would be awesome.

How would you all make a better monster theme in the sentai world?

Voted marital arts. Who would expect a sentai about wedding planners?

I like the idea of a mythological Sentai series, but (as I've said in other threads) the one I really want is one based on MMO / JRPG classes. Are Changeman, Dairanger, and Magiranger really the only ones with mythology-oriented mecha? Or am I forgetting one?

Changeman doesn't have a mythology themed mecha. It's just a set of vehicles.