I can see several different possibilities here.
1. Total (or near total) conincidence -- just so happens that he deserves this and it really happened, recently. Add to that the possibility that the women may have seen an opportunity to give their complaints some traction when they saw him in the news, maybe even to get some sort of payoff. On a "dirty tricks" scale of 1 to 10, this would be a 0, 1 or 2. Heh. A worthless dirtbag with skeletons in the closet, deserving (at the least) long prison time regardless of his wikileaks BS.
2. Dredging up the past: depending on the statute of limitations for rape in that country, this happened a while back, but got "brought current". Persuasive reminders by persons unknown have convinced the women to come forward. Originally reported or not, these are now prosecutable crimes based on facts, even though they are not recent. Just a taste of "dirty tricks"... 1 to 3 on the scale. The peacenik turd has other dirt in his past that catches up to him. The dirty tricks still don't compare to the original crime.
3. Fabrication: a good-sized portion of "dirty tricks" from power brokers that excel in such things, along with threats of more in store if he does not get his act together. The accusations are groundless. But with contrition and damage control, he could prevent a long jail sentence. No more wikileaks, for sure. 5-6 on the scale. Still, the weasel deserves something along these lines for his indiscretions. IMHO.
4. Kiss "yer butt" goodbye: This is the beginning of an all-out assault prompted from stateside (probably) and directed through powerful lines of association (for instance, via George Soros). The individual to conduct prosecution and the strategy for it have already been chosen. Many damning facts are in place. Sentencing will be severe. Additional problems --even worse ones-- await. An innocent (but arguably deserving) victim is persecuted thoroughly. 9 to 10 on the "dirty tricks" scale. Butthead might object that he does not deserve this, but as you say, he is playing hardball with the big boys and losing big time.
As you can probably tell, I have a good imagination when it comes to conspiracy theories. Hehehehe