Who are the agreed upon big 4 at this point in Marvel's life?
By big 4 I meant characters who everyone hates watching being played ie. Doom, Zero, Vergil and Morrigan. Magneto is as good as those characters but he is fun to watch because he can play defense, go offense and is just zipping around like crazy. I guess you can add Wolverine to that list too.
Speaking of Dr Doom, he's top tier as fuck in another game... Hearthstone.
Tier list hasn't actually changed from the past few months or so and I don't think they will.
Top Tier
Zero (da best character in the game)
Vergil
Morrigan
Dr Doom
Magneto
High Tier
Nova
Wolverine
Spencer
Viper
Strider
Dante
Firebrand
Dormammu
Phoenix
Mid Tier (you can kinda split these into Upper Mid and Lower Mid but I don't feel like splicing them up even further)
Trish
Storm
Akuma
Amaterasu
Dr Strange
MODOK
Spider Man (is really only weak against a few match ups among the top tier, can destroy various other characters)
Skrull (mostly because he pairs with Firebrand in a top tier as fuck team)
Rocket Raccoon
Viewtiful Joe
Chris
Hawkeye
Frank West
Hulk
Wesker (only relevant because of certain match ups and if paired with Vergil + Strider or Vergil + Doom)
Haggar (assist is still good, relevant as long as Wolverine and Spencer get played)
Sentinel (assist is still very good, Harddrive still very good)
Shuma Gorath (just for the assist)
These characters I would consider strong enough to be included in a team that is capable of winning a major even potentially EVO (or they have already done so) and thus are characters who are relevant to the metagame (meaning you should know about the tools of these characters if you are entering a tournament as you would have to deal with them potentially or they will get you wrecked).
Other characters don't have either the point capability or the support capability to be pickable or are simply trumped by another similar character in the game. Case can be made for Arthur and his support value but there are so many horizontal assists already available in the game. Same thing for Taskmaster, Hawkeye is just slightly better than him and even though Task is better in the Wolverine match up, Hawkeye straight up destroys characters like Doom which makes him a character who can win you a match in tournament more often than not (as an anchor battle of Hawkeye vs Doom is bound to happen).
X23 and Felicia are too much like Wolverine in their game plan to warrant being picked over him as they are not as good as him. Case can be made for X23 and unblockable set up but if you want to do that then you should be playing Firebrand anyway.
Iron Man is a worse Dr Doom or Magneto depending upon how you want to use him which makes him completely irrelevant. Ryu is a worse Akuma even now. Tron, Nemesis and She Hulk have far too many bad match ups along with really terrible assists/support value to make them pickable. Case can be made for Thor in certain match ups and I am certainly a believer but no one has had the success with him, we have only seen some glimpses. Chun Li is basically Ryu tier as well. I am a believer in Deadpool too but again, not enough has been showcased on him. Cap is not good enough even if he can steal matches with random HCS, it's simply not solid.
Iron Fist, Phoenix Wright, Ghost Rider and Hsien Ko are just plain bad characters who are dropped by even the most staunch low tier heroes.
IMO if your character is worse than Hulk, Taskmaster and Wesker (characters who I would consider on the cusp of being viable) then your character is not really viable.