So I was playing a quick match online against a team with Raiden. I was Heihachi, and it turns out if you use >R stick grab then >O, you can keep doing that combination with Raiden to fill up meter, and there's nothing the victim can do about it. Unless someone interrupts it. Unfortuately my partner was an idiot and didn't see me getting the shit spammed out of me. It seems like a pretty obvious infinite that the developers missed...Didn't know if any one knew that, but it pissed me off pretty good.
People are saying you can tech out of it, but I sure couldn't.