Green goblin team affiliation rule

[Jackal]

With oscorp weaponry, it states you may re-roll one opposing defense die. Do you make that re-roll before or after your opponent has rolled extra dice for his criticals?

[Negoldar]

It is after.

In the rulebook (https://www.atomicmassgames.com/rules) under Appendix A the whole attack timing chart is laid out. Resolving critical rolls are step 8. 

Step 9 is when rerolls and dice modification occur. 

First the attacker rerolls or modifies their dice. Then the defender does the same for their dice.

Then the attacker rerolls or modifies the defender's dice (this is when Oscorp Weaponry happens). The defender then modifies or rerolls the attacker's dice.