I think PC is not really the home platform for fighting games unless you release a supported fight-stick with the game and promise good online support and these two things are offered rarely for PC ports of the fighting games.
Anyway, Capcom’s latest crossover Street Fighter X Tekken will be heading to PC – NEOGAF. It features the traditional 2D combat fighting between characters from Street Fighter and Tekken series.
Though it has been confirmed for PC but don’t expect it to be released along the console versions of the game. It will be a delayed release as is the fate of PC these days and hopefully it will be DRM Free.