with urubaen getting so close how will the greenie grow without spells? oromis said that spells to cause a dragon to grow kinda screw it up. so how will it all work out?

The green dragon and rider (if hatched for the Varden) will me mentored by Eragon and Saphira, they may not be able to fight another rider, but in Eragon (the book) Eragon and Saphira were a mighty foe for non-riders (urgals).
Plus, the Green dragon will be greater than Saphira (at time being), because he will be tutored from the begining, not halfway through the story. The rider, if not already a magic user (Arya!), will be at an advantage compared to Eragon at time being (learn greater magic from Eragon, then Eragon from Brom).

i cant deny that but when they go to fight the king the greenie would still be pretty small compared to saphira let alone shruikan.

Yeah, I agree about him being too small.
How about the green dragon, unless it's Arya (I just have a feeling about that happening) stay in hiding until murtagh is killed/ captured. Once the final battle occurs, the green dragon fights on ground (unless its Arya, then they fight together against Galbatorix. Like all the shades..) and Eragon and Saphira fight Galbatorix.

i think arya will probally be the rider too. But how would the dragons rider affect the battle? just because the rider would be arya wouldnt make the green dragon any bigger.

The dragon wont help, but Arya is a mighty spellcaster, who can stand her own, so her strength would indeed help Eragon in a battle. (Instead if Galbatorix having to break into Eragon and Saphira's mind, he would have to break into Aryas, Greeny, Saphira, AND Eragons, if they combined forces)

right. however he wouldnt need to break greenies mind he could just kill him he doesnt need him to restart the dragons race just saphira and thorn or shruikan. and although arya is a strong spellcaster she isnt as strong as galby or maby even eragon(after his transformation to being elfISH). the green dragon just wouldnt be big enough to hold his own.

Galbatorix might want all of them under his control, or all 4 of the good guys can fight Galbatorix with there minds before he even can use a spell?

Elves are always stronger than humans right? (Arya was stronger than BOTH the twins right?) So, wouldn't a elf rider be stronger than a human rider? The only reason Eragon would be stronger is if they combine their strength with their dragons strength. (Because Saphira is way greater than Greeny)

arya as a dragon rider would probally be about equal to eragon because eragon now has the strength of an elf(he also casts elven spell). galby doesnt NEED all 4 under his controll just saphira and 1 male.

Yeah, he doesn't need them all, but he wants them. (He requested Oromis and Glaedr)

yes but he doesnt NEED all four.

1. Galby could wipe the floor easily with Eragon, Arya, both dragons and all of eragon's elven bodyguards easily so having Arya up there with eragon will not really make a difference to galby considering his vast power. He could probably attack Eragon with magic before Eragon could even attack Galby's mind.

I think they will have like 50 people gaurding the rider and dragon.

click please!!!!!!

Umm...
please be more specific. Who will have 50 people guarding the dragon and rider. Are you talking about when the dragon is still an egg controlled by Galby or a theoretical situation when it is controlled by the varden and has hatched and who would be the rider in this situation.

sorry i mean if the dragon is with the varden the might use the night hawks to guard it until it is big enough to fight on its own like saphira.

lolz,if the greenei gona b on gud sid,then i thnk he is hatced earlier,coz if not,then eragon cant stand hs own against galby+murtagh,,,,,,,,,,,,,,he ought 2 be bigr than atleast thorn i guess

Maybe Murtagh will become a good guy and fight with Eragon and Saphira as I hope he will.