T5 arrivals should be very quiet that time of morning ... there's a JAL flight around the same time but I believe other than that the next earlier non-preclearance international arrival is UA from GRU way back at 7am and the next is KE from ICN at 9:40am. Likewise the morning rush for TSA at T2 will likely have subsided (assuming current TSA woes are over by the time of your trip). So it's certainly not impossible, though I would not lollygag.