Do you think diana will recieve a skin this year?

I'm not a betting man, but I would say that it's likely that Diana might get a skin this year. The schedule for new skins (77 this year with the Project ones with 4 months left in the year) would suggest that at least 20-25 more skins might come out by the end of 2015 (Worlds and the Holidays not withstanding).

The question really is: Will Diana's next skin be worth the wait, either in quality or in value. The chances are just as good that Diana's skin would be a cheesy looking one at the 750 RP level (with recycled particles and no real innovations) than one at a higher level.