

At the 2014 San Diego Comic-Con, Harada confirmed that the game was still in development, with the reason for the scarce information being due to Bandai Namco waiting for the opportunity to market it. In April 2012, Harada stated that the game was about 10% complete. In March 2012, Tekken producer Katsuhiro Harada clarified that the poll would not decide the final roster, but will instead be used in conjunction with various research methods to determine the character lineup. There were 55 Tekken characters and 66 Street Fighter characters to choose from, and fans were able to choose five of their favorites from each series. On March 4, 2012, Namco released a poll on the Tekken Facebook page asking fans to vote for who they would like to see on Tekken X Street Fighter's roster. Namco × Capcom was a role playing game, thus making Tekken X Street Fighter and Street Fighter X Tekken the first games in the fighting game genre to be made by Namco and Capcom. However, this game consisted of characters outside of the Street Fighter universe as well as the Tekken universe and instead included various characters from Capcom and ones from Namco (like the Darkstalkers and Soulcalibur series, for example), and at least two characters exclusive to the game. This is not the first time Namco and Capcom have made a game together as they released a Japan-only crossover game in 2005 for the PlayStation 2 titled Namco × Capcom. He said the team has yet to finish the model as details and lighting were not completed. Katsuhiro Harada did reveal some concepts at gamescom 2010 such as a prototype model of Ryu, with the gi of Tekken 's Paul Phoenix. It was still in its early stages of development and no images or videos were released at the 2010 Comic-Con. Ryu and Jin Kazama appear on the game's promotional poster (shadowed by their alter-egos "Evil Ryu" and "Devil Jin" respectively). The game was planned to be released for the PlayStation 3 and Xbox 360 consoles however, owing to the discontinuation for both of the consoles, they were soon changed for both the PlayStation 4 and Xbox One instead.

The gameplay of Tekken X Street Fighter was going to feature the same 3D fighting game engine of the Tekken franchise as opposed to Street Fighter X Tekken which features the 2D styled gameplay of Street Fighter IV. Tekken X Street Fighter was announced on Jat the 2010 San Diego Comic-Con along with the Capcom-produced Street Fighter X Tekken.
