From what I saw about the gameplay in action from Angry Joe's YouTube channel, there were some impressions so far. The graphics were done with Unreal Engine 4 similar to Street Fighter V and King of Fighters XIV although people were already displeased with the way the graphics were done and especially for the character models and voices. The effects were fine for the engine alone but then, when it comes to cartoon-ish graphics done in Unreal Engine, there could be various shaders to make things cartoon-ish while retaining the coolness of the effects like what Arc System Works did with Guilty Gear Xrd and the upcoming Dragon Ball fighting game that uses Unreal Engine 4 itself.
Perhaps, it might be a mistake that way at first but the things is, the graphics of Marvel vs Capcom 3 are already in the same style as Street Fighter IV and Tatsunoko vs Capcom in which the cartoon-ish shaders are not used at all when it comes to 3D graphics. The only things that look comical are that certain screens like the Winner screen, Character Select Screen, Ending scenes, etc. look like something out of comic books. Perhaps, those aren't necessary for previous Marvel vs Capcom games but then, there should be comical feel in upcoming Marvel vs Capcom Infinite. Even the cinematic cutscenes are going in a different direction as well as if the game's not following the comic-style concept or some kind. Another problem is the art style in addition to how the characters are 3D modelled as stated above. I don't know if the criticism for this game is worse than the one for King of Fighters XIV or not but thankfully.
Also, the amount of characters is quite lower than in Marvel vs Capcom 3 but then, the game still has yet to be released sometime this month so we're not sure about the overall amount by the time of the game's release.
In fact, I don't even know if the game will have the Arcade Mode or not as the compensation for the incompetence Capcom has but to make Story Mode even more important like that than the Arcade Mode in terms of Capcom's game development is like they care less for the Arcade Mode like they do for Street Fighter V. Street Fighter V STILL doesn't have Arcade Mode as of the present time but to make it ABSENT for the consumer system versions isn't going to make any sense. In fact, that game also has the option to turn on or off the fight interruption when it comes to Single Player modes. That feature has been way to effective for fighting games in the arcades and it gets even more effective for fighting games on Nesica X Live 2 service with online matches as if going through various Single Player modes like Arcade Mode is not quite easy without getting interrupted. But taking out Arcade Mode for whatever reason is INEXCUSABLE! Not to mention that the arcade business part of Capcom has been doing well or something that it makes complaints about lack of finances obsolete after awhile as if the company has enough money to buy additional development kits for future main games.
Once again, it is INEXCUSABLE to take out Arcade Mode for fighting games like you and other players don't care for it! It is one COMMON AND STARTER GAME MODE for pretty much many of those arcade-style games regardless of the platforms! Furthermore, people expect sufficient content for Marvel vs Capcom Infinite when compared to the lackluster from Street Fighter V. Hell, even King of Fighters XIV has sufficient content like sufficient characters along with actual Arcade Mode which is called Story Mode. It is so successful that it also gets a proper arcade and Steam releases.