I was just about to say that
No i was!
Anyway, that sounds like a good theory, they have reached a peak and can go no further, or they are moving very slowly, through technology, and will only launch bigger weapons and bigger civilizations, and smaller weapons at smaller civilizations. If you sent a planet sized juggernaut that could rip through a planet (perhaps) why would you let a tiny civilization see it? Species can be very differant, one may take trillions of years to advance to subspace, others maybe able to build beam cannons after only seeing them for a month.
The shivans didn't know how powerful the human race was, they launched a warship that could wipe through most races (
) but it went BOOM. They sent a Ravana, that went boom, they sent a sath, that went boom, and they kept on loosing so they got rid of their capital in a way thast would surely damage them (perhaps they didn't know how big we were, wether we could of thrashed or get thrashed by 80 Juggs). That could of been just a time buyer so they could get the big guns ready, and, BUM BUM BUM!!! Superhuge warships with OMGHUMOUNGEOUSAURUSBURGERBEAMZ lets see how good this race really is? If they win this next one
A. Well this is a big powerfull enemy this multi-race, this will really be war
B. This is a dire threat, i wonder what they'd be up against a
real army
C. Hmm, this fly is starting to become a misquito, maybe we should squash it
D. "Another petty problam, hey waiter, can you get us a cup of tea? The soldiers Middle of the Orion arm in the milky way are having a little bit of a problam my dear, but if they made a co-ordinated attack I'm sure they could do it."
"But what if they loose father?"
"Oh, they won't, and if they did, we'll just send in the army from the neighbouring galaxys of NGC 4414, M104, NGC 4013, NGC 3314 and NGC 4945."
C'mon, someone prove me wrong about that one, i know someone can!! Someone can always cannonically or logically proove a theory wrong (out of the ones i've seen. Also, most of this is speculation using logic, not cannon, i mean the logic of; if Mrs Smith could be first named Johnathon, Robert, Rebecca, or Ben, I'd think it would be Mrs Rebecca Smith, that's the logic i mean.