The Primes were hanging out on Earth building a sun harvester. Fast forward a little bit, and by some random fluke, the Allspark just so happens to land on Earth, too. What are the odds? Whacky. But what a minute. A few thousand years after that, the Ark just so happens to crash on our moon? Of all the places in the galaxy? No way, man.

I hope they throw us a bone here as to why all these things happened to the same planet.
Although I realize I'm probably just going to have to turn off my brain and accept the BAYSPLOSIONS!
Which is ok by me. But still. Seriously?

 

The real world reason is budget limits. Cheaper to have everything set on present day Earth.

 

Face it. Earth is a magnet for all kinds of trouble. From oversized, radioactive dinosaurs and undead infestations to rogue artificial intelligences and invaders from outer space, this poor planet has seen it all.

 

That's a good point. It's like some crazy genius put a disaster magnet in the core of the planet.

 

just sit back and feel the g's man! 

 

Easy one.

1. The Fallen builds a sun harvester on earth.

2. After being ejected into space, the Allspark's systems guide it towards the nearest Cybertronian technology - the sun harvester on Earth.

3. Sentinel Prime goes looking for the Allspark in the Ark, locates it on Earth, crash lands on the moon.

I don't see what the problem is.  

 

Well, the AllSpark probably only ended up on Earth because it "followed" the Harvester somehow.

Also, I have the theory that on the movie-verse, Cybertron has only discovered one significant planet: Earth, the others were dead rocks or planets with not enough envolved lifeforms [or maybe involved, but lifeforms that died on the Great War].

So Earth is pretty much the only "succeful" planet that Cybertron knows of.

There's also the fact the Thirteen murdered the shit out of each other to protect Earth, that probably made the name famous.

 

SPOILER

Spoiler

Yep, it's explained in the movie. Sentinel planned the whole thing, and intended to meet Megatron here, at the site of the Fallen's harvester.

 

This.

 

The Fallen built the Harvester on Earth.
The Allspark was ejected from Cybertron, and according to the mythology about it, the Allspark becomes attracted and finds the closest Harvester to recharge.
But by pure luck, or whatever, when Sentinel's ship falls through the Space Bridge on Starscream's attack, the Ark just lands on the moon.

 

The Fallen built the Harvester on Earth.
The Allspark was ejected from Cybertron, and according to the mythology about it, the Allspark becomes attracted and finds the closest Harvester to recharge.
But by pure luck, or whatever, when Sentinel's ship falls through the Space Bridge on Starscream's attack, the Ark just lands on the moon.

 

This.
Not to mention Transformers are notorious for crashing their spaceships.

 

My theory with spoilers.

 

The harvester was built on Earth to get energy for the AllSpark
...
The AllSpark is attracted to it's fuel source
...
Sentinel was tracking it.

 

I thought the Ark crashed on the moon?

 

I think crashing IS landing for Cybertronian pilots.

 

Bingo. I'm surprised he's not the real The Fallen... It seems like the ROTF one is actually a pale imitation when you know the whole story.

He's a bastard, through and through.

 

The Ark was attacked on Cyberteon before it could leave orbit and into the space bridge. Then when it was out of control as it went through the Space Bridge, bam, the moon

 

Haven't ya'll figured it out yet? Earth is Actually UNICRON. and this is all part of his grand plan. To make more repaints, and ruin more childhoods.

 

Actually only Six (all original Primes) sacrificed themselves to keep the Matrix (by proxy, the Solar Harvester) away from Megatronus "the Fallen" Prime, the other six weren't distinctly involved, from what we know.