I would love to see some new music come out in the fall. I remember the first time I heard Rev Rad in full, I was walking around my college campus at midnight, with a nice brisk breeze, enjoying a good album.
The first time I heard The Static Age (which kickstarted my love for Green Day) was in October.
I always associate new Green Day music with cooler weather, and I would love to have that experience again this year. Even if it's just one song.