Team Iron ManvsTeam Batman

Team Iron Man Thor solos EZ.

Team Iron Man Dceu Shazam would and Batman are nothing for Thor. Flash will make a good fight with him and eventually lose.

Team Iron Man There are several ways to counter for Flash speed force with an incredible Versatility.
Time manipulation control, reducing the speed of time in the suroundings.
Power/energy manipulation control allows negation of the speed force leaving Flash without powers.
Soul manipulation control, separate Flash soul from his body. This power will not be used as it is not seen as good morals.
In the most probable scenario Thor us the macropowers of Mjolnir to negate Flash speed force energy. Without his speed force the young Mutate is helples,, the battle is over and Thor gives the boy a verbal lesson !