Future Warrior said:
Now about Future Vegeta, does you guys think he was a SS? Trunks not being surprised at him achieving the transformation kinda warrants it. And how much of an increase would he get from Mecha Freeza's arrival to when the Cyborgs kill him?
He never became a SSJ in the future. Firstly, future Trunks himself is the proof that Vegeta was never a SSJ. Future Trunks is clearly a saiyan born from non SSJ fathers (that means that he had to learn to transform the hard way, which is proved by the fact that he isn't a full power SSJ, unlike present Trunks or Goten).
Then we have Vegeta's strength in the present. Future androids are weaker than the ones in the present timeline, and Trunks could fight them at their same level. Vegeta's strength as a SSJ is much higher and would've been able to defeat those androids (in fact, there's a timeline where future Trunks defeats the androids before coming back to the present -the one Cell kills Trunks to get his time travel machine).