Depends on what the suit is about.
If the suit was about publishing or implying that he is working with Russia/wikileaks to undermine the US government/election, he should sue over that. That's a ridiculous claim. If they actually thought he was doing that, dude would probably be put in jail.
Just that places published that 'news' in favorable light makes them subject to lawsuits, I think.
If he's basing it on their media coverage being Pro Hillary, you can prove it, but it's not something that will matter, IMO.
Also, I kind of wonder if the tape in fact was released because of impending wiki leaks, not the other way around.
"Shit got real" in the sense that we are living in a very interesting time.