Huh? I just searched through all your files for the word 'ninja', and I didn't find a single reference?
Otherwise, it's a great update. I was checking up on the city graphics last night, and they seemed to work just fine. I didn't include the Early Flyer yet - the jury is still out on that one.
Man, if it was a snake it would have bit you!

The Early Flyer is the new secret unit built just for Ninjas! (ie... YOU!).
I guess you forgot how often you were always stating that there was no counter to the Airship, and I said the counter was Fighters... and you said you didn't want to build fighters (or something to that effect, because planes are bad, or whatever your belief was)... you don't remember that long drawn-out discussion?
You must really hate planes or something... you're talking about not including the Early Flyer? Do you realize what it is and what its purpose is? IT WAS MADE JUST FOR NINJAS! (you).
Think about it... You can't build the Early Flyer... NOBODY CAN! It's an unbuildable unit. Nobody has to waste one iota of effort or one production shield to build the Early Flyer, because you can't build it!
THE EARLY FLYER IS A GIFT UNIT
It's given to the first nation to discover flight... it's a one-time, good while supplies last only, offer! The nation that invents flight gets ONE Early Flyer immediately upon discovering the tech (like the first to Fascism gets a free Great General). That's it... one free Early Flyer (gift unit), then you start building the Early Fighter unit (which is better then the Early Flyer, but you have to build it, and that takes at least a little time... the Early Flyer is flying
immediately after the discovery of Flight).
It's free, and it gets a bonus against Airships... All the Ninjas in the world who don't want to build aircraft to shoot down airships, are just GIVEN a free natural counter to airships (as long as you invent flight first).
So, why in the world would you NOT include the Early Flyer in the Merged Mod... does your hatred of all things with wings include a free gift unit? What's the logical reason not to include the Early Flyer in the Merged Mod if it's supposed to be based on the Wolfshanze Mod? What harm does the Early Flyer cause anyone? I built it just for you!
You seem to have changed the tech tree very slightly in this new version - I'm curious what was the reason for that?
Ah yes... a very minor tweak to the tech tree. Some stubborn people were able to avoid WWI units all-together by avoiding a certain tech (Artillery) until the last possible moment, and skipping directly to WWII units... I never noticed it because I tend to want Artillery long before WWII units are a thought on my mind... I kept getting some folks who said they never saw WWI units and went straight to WWII units (which confused me cuz I never noticed that)... by making a minor tweak to the tech tree, you can't skip WWI units now... you have to go through WWI units to get to WWII units.
Simply-put, most WWI units have always required the Artillery Tech, but I didn't realize you could reach some WWII techs, then research Artillery and just "magically" skip-over WWI units. I put an end to that with a minor tweak to the tech tree... I doubt folks would even notice it when playing the game... it was a minor tweak.
P.S.
Since you now support 34-civs, make sure you are including the 34 (and now 35-civ) Earth scenario maps in the extra download on the Wolfshanze Mod page. I have an earth map with all civs (including Poland) that specifically uses Wolfshanze Mod civs, flags, colors, custom city sets and LHs as a companion to the Wolfshanze Mod... those Earth scenarios would be 100% compatible with the Merged Mod too!