Well ok guys I think you could take it but you are forgetting people like Dr Doom and Black Panther probably have contingency plans.
Anyway lets spice it up a bit. Ok you still get one years prep, but half way through your prep Black Panther finds out. You cast a spell on him so he doesnt tell the others. Somehow through his resourcefulness BP manages to warn two other people to join him. So BP has 6 months prep with 2 other people and they are:
1. Donald Pierce http://www.marvel.com/universe/Pierce,_Donald
2. Alpha Flight's Shaman
On the last day of the prep BP and company manage to Warn Reed Richards and Dr Doom. Dr Doom and Reed Richards manage to warn the other heroes and villains giving everybody and themselves just under one days prep.
Lets recap:
1. You have one years prep.
2. Black Panther, Donald Pierce and Shaman have 6 months prep and have been working together.
3.Dr Doom, Reed Richards and everybody else have had just under a days prep.