Just popping in here to add two cents. Rogue did have difficulty absorbing Ares powers around the time of X-Men/Dark Avengers (think was Legacy 227 right) and the writer confirmed on his Facebook page for those that were curious why when she has had no trouble absorbing Thor that the reason Rogue had difficulty was because she was injured at the time from her encounter with Moonstone. Granted Rogue's power absorption still actually worked, she just had trouble and looked as if she was in pain and having trouble coping with the absorption. I guess we should also look for situations where Wonder Woman was injured and couldn't walk and conclude that Wonder Woman can't walk anymore?? Possibly the more discerning fans familiar with Rogue might know that Rogue only has issues with absorption when it comes to other characters powers not the extent of power.
Rogue can absorb characters like Thor, Hulk, Iceman, but characters like Zero, Mojo, Mr Sinister and Loki would give her complications. Usually because of the psychological effects and supposedly the foul and evil nature of some of those characters. Rogue would also have trouble with traditionally with characters like Vision, Wonder Man and Silver Surfer because of the nature of their skin or lack of skin. That also being said since she has learned control, her abilities now seem developed and practiced enough to allow her to take the powers of Wonder Man. Impressive. Another note to make is that there have been situations where Rogue either opted to take select few powers only or was limited to taking only partial powers due to circumstance or ability. The nature of Juggernauts powers for example, meant whilst Rogue got stronger and Juggernaut a bit weaker, the absorption wasn't complete, we just got a stronger Rogue beating a weaker Juggernaut for a bit. Happened two other times both other times with their own complications. Magneto as well, Rogue has been in situations she has used his power without trouble, one situation where it was a bit hard to his personality seemed to overwhelm her. Other instances with Exodus and Legion she only used partial powers. Ares fits here as Rogue was injured at the time. Wonder Man would too, she couldn't in the past, she can now. Emplate is interesting to note here as well because he is very powerful but also traditionally depicted as being as foul, evil and gross as characters like Mojo and Mr Sinister yet modern day Rogue who is a bit more psychologically robust managed to take his powers okay. Rogue's ability is also near instantaneous when there are no complications.
My guess whether there would be complications with Wonder Woman and Rogue's ability to absorb her powers for the moment that we are just testing that and not thinking about the situation in which the characters are opposed against each other. I'd say unless Wonder Woman is secretly more disgusting, evil and foul as characters like Mojo and Mr Sinister and or the source of Wonder Woman's power is as sentient as Cytorrak, or her skin is much more inhuman and alien like than say Wonder Man and Rom then Rogue should be able to take her powers granting that Rogue is touching her. the only other circumstance she might have trouble is if this is Moonstone and Wonder Woman vs Rogue. Ultimately since both are fictional it also depends on the writer too. One fairly good writer who also had a blind spot for his pet character decided that his pet character had the ability to be immune or resistant to Rogue's powers so he could take her much young scared of intimacy insecure selfs virginity. So I guess if Wonder Woman also wants to try and take Rogue's virginity too she might be resistant or immune to her powers.
That also being said I believe in a situation where Wonder Woman is pitted up against Rogue, I can't imagine there would be many opportunities for Rogue to touch Wonder Woman. It would really depend how the situation is written or imagined though. Rogue currently has no powers other than her absorption. Wonder Woman lacking knowledge of Rogue might help, but that doesn't mean that Wonder Woman will fly to Rogue and gently hug her giving Rogue opportunity to absorb.
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