Do you think DOA's current reputation would prevent Sega from associating with TN these days ? :/
Like Tyaren mentioned yeah. Sega still produces and publishes their arcade cabinets though. There's no one else they'd go to produce the arcades. There's Namco, but you know how that is.
Though from what I heard, SEGA's very protective of their games (specifically AM2 team) and they are expensive, so even if they had the budget for it they'd check who they are working with I guess. But like someone mentioned, If the money is there, Sega would maybe give it a shot (which is unlikely given the budget treatment with 6). It just comes with the integrity of it all.
If the latest game has been nothing but negative press, sorta scamming it's customers, hair issue shenanigans, and barely any budgeted support. I don't think Sega would re-fire that contract again, with the exception of just producing their arcades. I wouldn't be surprised with Square not doing it either, and it would be for good reason.