I just opened the April issue of Game Informer, flipped over to page 3 and 4 and found a Virtua Fighter 5 two page ad. At the bottom of page 3, there's an Xbox 360 logo together with an Xbox Live logo
I know, this doesn't necessarily mean that VF5 on the Xbox will support online matches.
In its most basic form it will probably support online ranking boards, but oh well.
We can only hope right?