Well pretty much every Tekken starting with 3 (I THINK) had Tekken Force, which was a beat 'em up. 5 had the same thing, but with only Devil Jin. But the co-op was in 6's 'Scenario Campaign'. Which was the same thing under a different name, for whatever reason.
As for TTT2 having a Tekken Force-esque mode; I don't think anything has been announced yet, but because of the sheer scope of how many characters there are, how many stages, how many gametypes, outfit pieces, etc. AND the fact that it's a non-canon game pretty much DESIGNED to be a tourney fighter... I wouldn't bank on it.
Now Tekken 7... If/when THAT comes out, I'd be surprised if it DIDN'T have Tekken Force. xD
Every Tekken game since T3 has had a Tekken Force or Devil Within or Scenario Campaign mode... except for the original TTT. TTT2 may follow TTT's lead and omit it as well. Since it hasn't been announced yet, and since Namco seems to be devoting their resources to things that affect the actual game (chars, stages, customization), I wouldn't count on it.
Bonus novelty minigames like Tekken Ball or Bowl don't require as much dev time, and aren't as big a deal (as they made Devil Within and especially Scenario Campaign out to be...), so I bet there might be an announcement regarding one of these closer to release.
Velvet dreams. Starlight beams. Plastic freaks. On the streets. Take me home. Before I'm dead. SciFi girl. In my head.