@Enlong The Saiyans aren't gone, Trunks is still around sending you on quests and you go back in time to when the Saiyans were still around.
Also the humans have pretty much been turned into the Saiyans, because the developers realized that humans can't be useful without Saiyan blood. So yeah. Every human is part Saiyan.
He's not doing it for his future, he's doing that because the Big Bad of DBO, Miira, is a threat to all timelines and Trunks has to stop him from fucking around with them.
So for instance, you go back in time and prevent Miira from messing with Goku's battle with Nappa.
It always had room for two.
Also, it's not like it's out of character for Trunks to save one timeline that he'll never see just so that there can be a timeline totally free of whatever evil he's currently fighting.
Remember that bit where Trunks and Krillin warped to the past, and blew up Cell's gestation tank before he ever matured? Didn't do a thing to stop Cell in either of their times, but at least there's a timeline where Cell never did anything.
also: all humans have trace amounts of Saiyan blood? How did Goku's and and Vegeta's lineages spread that far in a span of 200 years? Though, I suppose it makes a bit of sense to make that move, since the other two races are Namekians and Majins. Of course, how the other two races can be balanced with a race of Majin Buu is anyone's guess.
I have a message from another time...I don't think it did, because Cell couldn't even fit in the pod by himself in his first form and he wasn't that much bigger than a normal person.
And the idea is that their aren't thousands of player characters running around in story. Also the Majins are substantially weaker than Boo was because Boo created them by dividing himself over and over again.
To clarify, they blow up the Cell in the current timeline. The one who absorbs the Androids is from a different timeline who warped back to the past.
If I remember correctly, Word of God states that there are four timelines. One is Trunks' future where there is no time traveling, one is the main timeline where the story takes place, the third is the timeline where Trunks goes back to the future, gets killed by Cell, and the Cell egg goes back, and the fourth is where Trunks goes back to the future and kills his time's Cell.
edited 4th Jul '12 10:59:05 PM by DarkConfidant
Didn't they? I admit that all I remember of the scene is the moment where Krillin blows up the tank. I suppose it makes sense that they didn't feel the need to use the time machine, since Cell matured the first time by taking The Slow Path and then taking the machine back.
Either way, Trunks is definitely the kind of guy to save a timeline, even if it's not the one he's going back to.
Wait, but which timeline is the one where Krillin blew up Cell's gestation tank? It being the main timeline, that means that Cell didn't mature, but they still got attacked by a time-hopping Cell from the third timeline? geez. How doees the machine even decide which timeline it hops to?
edited 4th Jul '12 11:02:17 PM by Enlong
I have a message from another time...Nope. After Kamiccolo's encounter with Imperfect Cell, he reveals the information to Trunks and Krillin, who go back to the ruins of Gero's lab and find the incubating Cell. They also find the blueprints to 18 and something about a nuclear powered toaster while they're there, which Bulma uses to build the emergency shut-off switch.
edited 4th Jul '12 11:01:58 PM by DarkConfidant

I think Ginyu means milk.