What if.....Marvel's Sentry, Thor, Beta Ray Bill and Gladiator entered the DC universe on Earth
Scenario 1: Pre N52 They appear the day the Justice League first has to unite
how does this effect the events to come? will Doomsday still be able to kill Superman when he shows up? How will the Justice League's future be altered?
Scenario 2: New 52 same deal, the day the Justice League has to unite they appear in DC,
How does the world of New 52 DC become altered, how will the relationships formed be changed by the arrival of these new heroes,
anything else about these scenarios is up for debate as well.
Scenario 1: Pre N52 They appear the day the Justice League first has to unite
how does this effect the events to come? will Doomsday still be able to kill Superman when he shows up? How will the Justice League's future be altered?
Scenario 2: New 52 same deal, the day the Justice League has to unite they appear in DC,
How does the world of New 52 DC become altered, how will the relationships formed be changed by the arrival of these new heroes,
anything else about these scenarios is up for debate as well.