Fans have speculated that the Marvel vs. Capcom Fighting Collection is not being released on Xbox due to Capcom's MT Framework engine being deprecated on the Xbox One. This theory suggests that Capcom may have decided it is not worth the time, energy, and resources required to bring its MT Framework collections to Xbox One. However, this remains speculation as Capcom has not provided an official explanation for the exclusion of Xbox from the game's release.
Capcom announced the Marvel vs. Capcom Fighting Collection alongside two Ace Attorney Investigations titles in a similar collection. The Ace Attorney Investigations collection is coming to Switch, PS4, PC via Steam, and Xbox One.
The exclusion of the Xbox platform for the Marvel vs. Capcom Fighting Collection has caused a backlash among fans, with the phrase "No Xbox" trending on social media. Xbox owners expressed bewilderment and anger at the decision, particularly as the Marvel vs. Capcom series has a long history on Xbox platforms. This has led to speculation about the reasons behind the exclusion, with some suggesting it may be due to Capcom's MT Framework engine being deprecated on the Xbox One. The situation has marred the excitement for the long-awaited return of the popular crossover fighting games.