Dead or Alive
There was going to be a connection between Ayane and Christie but it was dropped when Ayane became more of a heroineWhile Ayane was never depicted as flat-out evil, her role was a bit more morally ambiguous namely on how Ayane was originally known as the one whom killed Helena's mother. Granted Christie has been revealed to be the one whom killed Helena's mother and was sent to kill Helena. However in Dead or Alive 2 when Helena tried to approach Ayane in rage accusing Ayane of killing her Mother, Ayane was pretty much mocking her questioning on whether if that was true. Granted Ayane wasn't flat out confirming it but she wasn't exactly denying it either. It seems oddly coincidental on how Ayane would make cover-up attempts over a murder she had nothing to do with. However by the time that happened Ayane was becoming more of a heroine especially during the modern Ninja Gaiden series. Which is the real reason why Ayane no longer had anything to do with the murder of Helena's Mother. I mean what? Where they worried about the potential implications of a teenager getting involved with a grown adult whom occasionally dabbles in nudism if Ayane and Christie did work together? (Granted I am sure certain fans wouldn't mind the "Potential Mental Imagery" there but still.)
Xtreme Beach Volleyball is real and Dead or Alive is fake.
Ninja Gaiden (Sigma and Sigma 2), DOA, and Volleyball are the past of the Halo Universe
Kokoro will not be returning in DOA5The canon storyline will have her defeated before reaching Helena, thus she'll just have gotten her confidence beaten out of her and sent home to mummy.
There will be a third DOA Extreme game but it will be one big Affectionate Parody of itself and its fanservice-laden World of Buxom nature.Naturally this will try to push the M-Rating as much as possible, in which this be more dialogue driven and the game will play up certain aspects like the Les Yay in the series a lot more. A lot of the characterization in the game will be due to which DOA girls will you pair with (in which some pairings will be a lot friendlier than others). Some character pairings will probably have little to no Les Yay (or any interaction at all) while others will play it as much as possible. (But any Ship Tease will most likely be Played for Laughs of course.) However, the fact that fans often like to pair the ladies with each-other (often due to fanservice) won't be the only thing that will be mocked, as character interactions can also lead to other gags such as the ladies trying to comment on various other parts of the series' storyline and try to understand them.
There will one day be a proper Virtua Fighter vs Dead or Alive crossover game.There will be roughly 15 to 20 characters from each series, each being a counter to another, such as Shun Di vs. Brad Wong or Kage vs. Ryu. The core gameplay will be done by AM2 while Team Ninja will do the character models, story, and overall presentation. The story will involve DOATEC and J6 being competitors in a sort of arms race to see who can create the perfect fighter. Both have their own tournaments to choose fighters to experiment on and gather data, and each one accuses the other of ripping off the idea. DOATEC went for cloning and genetic research while J6 opted more towards robotics and cyborgs with the occasional brainwashing and child soldier. Their covert war will turn overt, and fighters from both sides end up involved in the conflict.
Kasumi's status as of the end of DOA5 is that of an exile.She appears to be a guest in the Hayabusa village and wears the appropriate uniform. Its possible that Hayate, as head of the Mugen Tenshin clan, has found a Loophole Abuse to Rules Lawyer away the death sentence on Kasumi's head. He had Ryu adopt her as a sibling, thus any attempt to harm Kasumi would involve declaring war on an old and trusted (not to mention freaking powerful) ally. As a formal member of the Hayabusa clan, Kasumi is not subject to death squads anymore but is now exiled from her home village. This is not so bad since Hayate and Ayane are both frequent visitors to the Hayabusa village and while the Mugen Tenshin elders probably are not too happy about it, the fact is that the head of the Hajinmon Sect (Ayane) follows Hayate's every command and he himself is the head of the Tenjinmon Sect, there really is no one in a position to challenge the legal fiction. "False" Kasumi more than a Red Herring status, and would serve as a bitterly ironic twist of the knife to Ayane and Hayate. "Hey, remember that "soulless monster" you cut down earlier? Yeah, turns out it's Back from the Dead (or at least was Not Quite Dead as you thought), and is now fighting FOR Donovan after you tried to kill her, in spite of her believing she was always on your same side." This would also serve as a Tear Jerker-loaded setup for a Mirror Match between Kasumi and Phase-4/"False" Kasumi, with Phase-4 thinking Kasumi is another one of her "clones" that she needs to kill off (or, alternatively, calling Kasumi out for wanting to kill clones with thoughts and feelings of their own), and Kasumi becoming shocked and horrified that her clones aren't all Always Chaotic Evil (like Kasumi-Alpha or Alpha-152 were), and realizing she's become as much a bloodthirsty monster as some of the villains of the series for wanting to kill her clones out of her hatred for them.
Brad Wong isn't ChineseBrad is an American hippie who somehow found himself in China when he was younger and learned drunken kung fu. Brad isn't exactly a very Asian name, and he just calls himself "Wong" because it sounds cool. One of his outfits is a cowboy after all.
There's going to be a final DOA5 revision that adds back more of the playable characters from previous DOA titles (Raidou, Tengu, Genra, Kasumi Alpha, Shiden, etc.), along with a few more faces from Ninja Gaiden and Virtua Fighter.Of course, this would conflict with the existence of DOA5 Ultimate, since it would no longer be the "ultimate" version of DOA5, but there's already Ultimate: Arcade, so there's a chance for that version to be eventually ported back to consoles or made into a DLC update. Naturally, any of the long-deceased boss characters would be non-plot entities, and of the aforementioned characters, Tengu and Kasumi Alpha may be phased out entirely due to Nyotengu and Phase-4's presence in Arcade. Ninja Gaiden is ripe with characters to use, although it's likelier that the modern trilogy—and guys like Murai, Genshin, Regent of the Mask, or any of the more humanoid Greater Fiends—would see more representation with the precedent set by DOA and its chronology (the only exceptions would be Irene or the more probable Jô Hayabusa). As for VF, Kage-Maru could make for a good rep. Why Kage? Because ninjas, that's why. Plus, the possibility of a Double Izuna Drop tag throw with Ryu (or alternatively, Kage-Maru's Hagakure-ryu You Ko'enraku into a leaping sideways Izuna like in Ryu and Tina's tag throw) is too good an opportunity (and insanely awesome) to pass up on. ... You know what? Let's add Dural into the mix. With that, "humanoid bioweapon created by shadowy organization that is connected to a ninja" can be emphasized among the list of DOA/VF parallels (as touched upon in the above crossover WMG).