couple more questions regarding new universe/fortress of solitude
you cannot play this when conceding before the battle, correct?
if it is negated, is the concession also negated? would you have to wait until next turn to concede?
I believe that you are still able to concede. That is not a negate-able action
BL specials would completely 'negate' the New Universe/Fortress of Solitude.
If someone plays Fortress or New universe (or other conceding type card) and it's negated, then that stops the concede as well. The whole action is canceled.
-BBH
The player attempting to concede could then concede again on their next turn, just without the benefit of the EN special to protect their venture.