Wow that question has me wrecking my brain. Which last Marvel piece prior to Storm was a 1 day sellout. Hmmmm....
I think both the EX Rogue and Skaar PFs came close. If I remember correctly, both of those went up for PO with an ES of 750 & 500 immediately established. That caused a pretty quick sellout. Everything else Marvel related has had a open or TBD ES since then as far as I can remember. This last statement doesn't include any variants obviously.