Okay. . . let's get things straight here;
- I DON'T think that DE Sidious would get owned by Revan. I DO however, want to see some proof that he is indeed this uberly powerful Force-user, other than the fact that he can conjure up a Force Storm. I'm not underestimating him, or denying him credit, but I don't want to make him the most powerful Sith based on one ability.
- In the DE series, the combined power of Luke and Leia wasn't all that powerful. It was definetely stronger than Yoda or the original Sids, but not all that mighty. A good Sith, like Revan, could pull that off.
- Since Revan seems to be the "Ancient" coming up here, and Genises said that Yoda would barely lose to Revan, meaning it would be like Yoda vs. Sids, that is saying that Sidious in ROTS is on par with Revan. I know that's probably not what you meant; just saying. Now, I don't think Revan could oown Yoda with despicable ease, but Yoda has characteristics other than his raw power that make him hard to beat in a fight. His small stature for example. However, if the battle escalated, or even began in a Force battle, I think Yoda would fall.
I'm not deducting that DE Sidious would get owned by Revan or someone. Just that when you compare him to the ANCIENT, ANCIENT Sith, like Naga, or Marka, it just doesn't seem that he's all powerful. My main point here is that one cannot judge power based on a single ability alone; is that unfair for me to say?