I have found two FSO events that may be possible to do.
The Battle of Hamburg, codenamed Operation Gomorrah
This can be a neat event do to a day and night bombing not just on the city, but a vast other targets that was part of the operation:
Blohm & Voss U-boat pens/yards, Oil refineries and Hamburg larger Nazi companies in steel, mining, RR, Chemical, AC production and vehicle production
As far as what i found, B-17s and Lancasers are the only two AC that we have that took part in the operation. Not sure what escorts, attackers/ fighters where used or what Axis defensive AC involved. This can be a event that can have 2 day and one night framed or something in that mixed.
Battle of Normandy (what if scenario)
The greats air battle that allies expected never took place in the summer of 44. But What If it did. At the eve of the invasion, Germany launches a vast air defensive attack in the air and ground to try to push allies back. This event can be set up similar to "Long December" event where allies can capture bases and axis try to stop them.
Ground action: we can used a combination if LTVs and C-47 to capture bases on the coastal with air support of attack AC. The bases that where capture, will be in allies hands in the second framed where we can used M-4, M-16, Jeeps as part as the allies effort in establishing a beach head. Axis will have Panzer, Tiger, WW, Ost and 256 to recapture bases and fight off the allies advancement.
Air action: A mixed of bombers, attackers and fighters will weaken the ground defensive of the axis along the cost. Meanwhile, Axis will surprising the allies with a mass air force by preventing the allies air/ground offensive. They will also attack cruses, destroyers and LTVs.