Would be sweet to have some Gladiator vs CR.42's in an early Africa Campaign.
I asked for those all the time when the game was new and argued vociferously against the B-29 in favor of 
anything  else.  I argued for the Brewster, light AC at Vehicle bases (I suggested any hangar queens be placed there to get them usage:  P-40s, Kates/Vals, etc.)  I about fell over when he modeled the FM2 and the Brewster.  
I would love an early war plane set in Spain, Africa and the Pacific.  Too much resource outlay for one or two fliers though.  I have no doubt HiTech would love to have full arenas of all kinds.  We used to have enormous dreams for this game you know, really big, sweet, dreams.