I'll write this to get some fun at this late hour while I wait for some long task to finish.

I saw comments around about this image and they're so wrong imho (like Wonder Woman incapable of defeating Magneto or Scarlet Witch or the Hulk or Wolverine). Let's clarify some things:

Wonder Woman cannot be underestimated at all and never should be. Let's start with this: A few years ago I read Batman in a saga, hiding in some boxes all the "weapons" and info able to defeat the Justice League, in case they go evil or get possessed etc.
Therefore you could find the obvious Kryptonite for Superman as well as all the possible countering for Flash, Green Lantern, Cyborg, Aquaman. The only one left with an empty box was Wonder Woman: https://i.stack.imgur.com/ipjBd.jpg

If I remember correctly there was just a letter with the symbol of Superman in it. The reason being: Wonder Woman has no weaknesses and they could only hope to overpower her with Superman, which is a pathetic hope, since even Superman is:
1) Vulnerable to magic (and WonderWoman is an expert user of magic tools...)
2) Not a martial artist nor a warrior (and WonderWoman is top-tier there with Batman)
3) He loves WonderWoman in some ways (as a good friend or lover, depending on ages^^)

Wonder Woman has some troubles against Superman usually because it's more difficult to capture your opponent than kill him, and she doesn't have enough power to take the "difficult road" with Superman (since he is more powerful and invulnerable), therefore either she kills him fast with a magic weapon or he wins (she even cut the throat of Superman with her crown once). The only chances of the whole world if Wonder Woman changed sides, is to Superman to overpower WonderWoman with superior speed, strength and resistance (but let's remember that WonderWoman is not a common amazon, she's got super-speed and super-strength as well).

Now, if even the DC universe is scared of Wonder Woman, if even Superman has got few chances (50-50 I'd say) against her, how could Hulk stand any kind of chances? Hulk is no martial artist, has got much less speed (WonderWoman is a speedester, pretty much like quicksilver) and no fly, pretty much the same strength (even if he evolves to infinite strength but still it's not enough when your opponent overpowers you in everything else and is still strong like Thor).

Magneto and Scarlet Witch are far from being "without weaknesses", the simple superspeed can overpower them, a surprise attack or fast ranged attack and they're gone, who's better than a super fast martial artist amazon with ranged weapons to hit them fast and one-shot them? They're normal humans if they don't have time to use their slow "magic".

In my opinion the only ones that have any chances to defeat Wonder Woman are the best fighters which got some superpowers too. In particular: Captain America, Wolverine, Spiderman,Thor.

- Wolverine will probably get defeated the first round (he is the slower of the four, the less strong, the worst fighter even if he is still a very good one), but he can get up and keep going against her till he kills her (even if he needs days for that and WonderWoman may destroy/block him before in several ways).
- Captain America is probably the only fighter that has got the same ability and experience of Batman and WonderWoman, he's got some super-strength and speed and agility, and a very good weapon therefore he's a sort of weak-male-version of WonderWoman but he has still got some chances to stun her with the shield and be effective in both ranged and hand to hand fight.
- I see Spiderman as an even better fighter in a combination of long-range and melee-range. He has got brain and more powers compared to the previous two, Spider-sense which makes him avoid anything (he is the true "Superman" of the Marvel universe, with all the powers he got, which together can counter pretty much anything from superspeed to ranged attacks to melee fights) but he lacks damage, his strength alone is not enough to break the defences of powerful opponents.
- Now, the last one, Thor. Imho Thor has more chances to win against WonderWoman than Superman himself. Because Thor has enough power to slightly overpower WonderWoman (they're on par imho, but Thor has got much more magic-ranged-damage), plus he is a very good melee fighter, he is got superhuman reflexes too therefore fast enough to fight her and has no great weaknesses (sometimes he got the one that he cannot lose the hammer or he transforms back into a human after one minute), he can pretty much do everything she does and more. But if I think back to Hulk, my mind still says Thor may lose against Hulk but WonderWoman should win, due to WonderWoman using more superspeed and agility than Thor while Hulk being pretty much static against them (and Thor against Hulk is pretty much static too).

Still I seem to see Thor defeated in that image, which is possible unfortunately (as I said, due to superior speed and agility of WonderWoman), therefore imho that image is completely a possible outcome, with Cap.America being the best hand-to-hand combat fighter (with superhuman agility, strength, speed) with a great defence (the shield) still standing still and Wolverine and Hulk are sleeping but will wake up in some hours thanks to their regeneration^^.

Of course that is possible if she fought them one by one or close to that, she cannot win the Marvel Universe unified.