Stevenson - Kovalev. Has to be favourite right now. Then in no particular order... Golovkin vs Froch / Ward Mayweather vs Lara / Pacquiao Provodnikov vs Rios / Maidana Donaire vs Gradovich / Vetyeka Rigo vs Lomachenko (if Loma can get in a couple more pro fights first)
Of the fights that could conceivably be made this year, I'll go with Kovalev-Stevenson. I would have chosen GGG-Froch but that fight is very unlikely to happen this year.