History WMG / NinjaGaiden

** Possibly, but Itagaki did tease the fans prior the official release of Ninja Gaiden II (UsefulNotes/Xbox360) that Sonia might not be her real name, and many years before that, when Itagaki created the ''Videogame/DeadOrAlive'' franchise, he was the one who accepted Ryu as a GuestFighter in his game and started the merge the series in the first place; it was in the first ''Videogame/DeadOrAlive'' game that the fact Irene and Ryu married became CanonImmigrant from the [[OriginalVideoAnimation OVA]]. Itagaki only started his FlipFlopOfGod after the 3rd ''Videogame/DeadOrAlive'' or so; things started to merge togther more after his leave from Team Ninja, but Itagaki did start TheVerse thing, and eventually would merge things out his way had he stayed, so it's not just new Team Ninja's idea.

* Maybe Irene and Ryu aren't really married and running an antique shop in New York -- it's just a cover story the CIA created so that Irene can use the antique shop as a front for a secret base where she can monitor the trafficking of stolen supernatural artifacts.

** Possibly, but Itagaki did tease the fans prior the official release of Ninja Gaiden II ({{Xbox360}}) that Sonia might not be her real name, and many years before that, when Itagaki created the ''Videogame/DeadOrAlive'' franchise, he was the one who accepted Ryu as a GuestFighter in his game and started the merge the series in the first place; it was in the first ''Videogame/DeadOrAlive'' game that the fact Irene and Ryu married became CanonImmigrant from the [[OriginalVideoAnimation OVA]]. Itagaki only started his FlipFlopOfGod after the 3rd ''Videogame/DeadOrAlive'' or so; things started to merge togther more after his leave from Team Ninja, but Itagaki did start TheVerse thing, and eventually would merge things out his way had he stayed, so it's not just new Team Ninja's idea.

* Maybe Irene and Ryu aren't really married and running an antique shop in New York -- it's just a cover story the CIA created so that Irene can use the antique shop as a front for a secret base where she can monitor the trafficking of stolen supernatural artifacts.

* One of the paths for Itagaki's possible plans to merge the NinjaGaiden and ''Videogame/DeadOrAlive'' worlds was through Muramasa change of jobs. The last Dead or Alive game by Itagaki was the 4th one, in it there's a stage with Muramasa running a Vegetable Mart; something which he never mentioned to have in the Ninja Gaiden time-line. There might be a connection to Ryu's ownership of a Antique Shop in Dead or Alive and Muramasa's rennouncement of his own for a Vegetable Mart, it could be a ReTool in that Muramasa passed his Antique Shop to Ryu as he went on to open a more healthy business; the OriginalVideoAnimation never actually explained how Ryu opened the shop, and the ReTool can just discart or expand the fact that originally the shop resides in America, ''Videogame/DeadOrAlive'' don't actually says where Ryu's shop is located, and Muramasa appears to have more than one shop, so Ryu's shop in america could be just another one of Muramasa's.

* Should the NES games be redone, they would likely be based on the New series but traits/signs from the original games (such as the shadow clone and sword extend power ups from the later NES games)

* One of the paths for Itagaki's possible plans to merge the NinjaGaiden and ''Videogame/DeadOrAlive'' worlds was through Muramasa change of jobs. The last Dead or Alive game by Itagaki was the 4th one, in it there's a stage with Muramasa running a Vegetable Mart; something which he never mentioned to have in the Ninja Gaiden time-line. There might be a connection to Ryu's ownership of a Antique Shop in Dead or Alive and Muramasa's rennouncement of his own for a Vegetable Mart, it could be a ReTool in that Muramasa passed his Antique Shop to Ryu as he went on to open a more healthy business; the OriginalVideoAnimation never actually explained how Ryu opened the shop, and the ReTool can just discart or expand the fact that originally the shop resides in America, ''Videogame/DeadOrAlive'' don't actually says where Ryu's shop is located, and Muramasa appears to have more than one shop, so Ryu's shop in america could be just another one of Muramasa's.

** Possibly, but Itagaki did tease the fans prior the official release of Ninja Gaiden II ({{Xbox360}}) that Sonia might not be her real name, and many years before that, when Itagaki created the DeadOrAlive franchise, he was the one who accepted Ryu as a GuestFighter in his game and started the merge the series in the first place; it was in the first DeadOrAlive game that the fact Irene and Ryu married became CanonImmigrant from the [[OriginalVideoAnimation OVA]]. Itagaki only started his FlipFlopOfGod after the 3rd DeadOrAlive or so; things started to merge togther more after his leave from Team Ninja, but Itagaki did start TheVerse thing, and eventually would merge things out his way had he stayed, so it's not just new Team Ninja's idea.
* One of the paths for Itagaki's possible plans to merge the NinjaGaiden and DeadOrAlive worlds was through Muramasa change of jobs. The last Dead or Alive game by Itagaki was the 4th one, in it there's a stage with Muramasa running a Vegetable Mart; something which he never mentioned to have in the Ninja Gaiden time-line. There might be a connection to Ryu's ownership of a Antique Shop in Dead or Alive and Muramasa's rennouncement of his own for a Vegetable Mart, it could be a ReTool in that Muramasa passed his Antique Shop to Ryu as he went on to open a more healthy business; the OriginalVideoAnimation never actually explained how Ryu opened the shop, and the ReTool can just discart or expand the fact that originally the shop resides in America, DeadOrAlive don't actually says where Ryu's shop is located, and Muramasa appears to have more than one shop, so Ryu's shop in america could be just another one of Muramasa's.

** Possibly, but Itagaki did tease the fans prior the official release of Ninja Gaiden II ({{Xbox360}}) that Sonia might not be her real name, and many years before that, when Itagaki created the DeadOrAlive franchise, he was the one who accepted Ryu as a GuestFighter in his game and started the merge the series in the first place; it was in the first DeadOrAlive game that the fact Irene and Ryu married became CanonImmigrant from the [[OriginalVideoAnimation OVA]]. Itagaki only started his FlipFlopOfGod after the 3rd DeadOrAlive or so; things started to merge togther more after his leave from Team Ninja, but Itagaki did start TheVerse thing, and eventually would merge things out his way had he stayed, so it's not just new Team Ninja's idea.