my "ideas" are:
after BoB (even it is not my personal favorite scenario, its is set, so....) it would be nice to get a first adon called like "Dieppe 42" or "Channel 42". No new map would be needed ( i still belive one of the mayor tasks in the SoW series is to build a map at the shown high standards..), perhaps just "modifications".
the pool of possible planes would look like this:
Hurricane Mk.IIc
Spitfire Mk.Vb
Spitfire F.Mk.IXc
Typhoon Mk.Ib
Whirlwind Mk.I
Mustang Mk.I
Boston Mk.III
B-17E
Bf109G-1
Fw190A-3
Do217E
after that a huge AdOn , called "Tobruk 42", as the main map the Cyreneika, an additonal of Malta and Sicily would be awsome - but most propably to much work.
A nice tactical scenario this NorthenAfrica one, with a lot of "mudmoving"
possible planepool
Bf109F-4/Trop
Bf109F-4/B/Trop
Bf110F-2
Ju87D-1
Ju88A-4
Mc202_VII
SM79
Hurricane Mk.IIc Vokes
Spitfire Mk.Vc Abukir
Kittyhawk Mk.III
P-40F
Boston Mk.III
Baltimore Mk.III
IF with Malta RN carrier operations would be awesome with Fulmar, Seahurricane (i guess a Martlet is a no go because its a Grumman) and Swordfish