A lot of speculation has been riding around the release of Marvel vs. Capcom Infinite, and news has it that the game will be scaling down and only letting teams consist of up to two characters. This choice may be odd, seeing that the game is coming to more powerful consoles, but it looks like the choice was made for the players.
According to Segment Next, the reason why Capcom had decided to scale down the team members was because they felt that having teams consisted of three characters forced some players to use characters that they didn't really like. It was also said that having the two-character team would "emphasize the feeling for a partnership and loyalty" among the characters, and it would also make the game easier to play for beginners.
Though the game looks to be taking a step backwards with the decision to have two-character teams, Marvel vs. Capcom Infinite will also be adding a new gameplay mechanic to matches in the form of Infinity Stones. By the looks of the trailer, it looks like the stones will be available for pick-up within matches, and players get different types of power-ups depending on which stone they use. It's possible that relics like the Power Stone can increase damage of one character, while the Time Stone could give a temporary speed boost.
As of now, the only confirmed characters for the roster are Iron Man, Captain America and Captain Marvel for the Marvel side, and Morrigan, Mega Man X and Ryu for the Capcom side. Rumors have also suggested that the villain this time around will be Ultron who is infected by the Sigma virus from the Mega Man games.
No official release date has been announced for Marvel vs. Capcom Infinite, but it's speculated to come out later this year.