Scenario 2 is an obvious DC win for me unless iceman is omega level. But Diana certainly isn't winning. She certainly destroys any one of the X-men one on one but together there is no team that works together better than the X-men. People are forgetting that Jean is not just a extremely powerful telepath but an omega level telekinetic as well (her main power) her shields can and will deflect a automatic speed blitz from Diana. She can also use her telekenesis to slow or even freeze WW in place then the glass cannons go to work every one of these X-men (except dead pool) has the ability to hurt her speed equalized. Scotts blasts are brutal when he's not holding back, storm can summon lightnight to hurt high level targets but she has also used her winds to turn both colossus and wolverine into supersonic giant bullets (see inferno) and rouge can drain her (or affect her phisically if we're saying she has MM powers.) round 3 gets worse for her if Scott has prep..