During the one month prep, he'll just destroy the universe, so yeah....
Thanos can destroy the universe and create it back with no prep-time at all. That's what the IG is for.
This may seem like a stupid question but which universe are they fighting in?
IG works in only Marvel Universe. I know its a terrible series but they established that in JLA/Avengers
I love Thanos but AM takes this one.