Recent future releases that have been announced are:
AMP (Mikro-Mir): 1/72 & 1/48 Macchi MC.72, 1/72 Piaggio Pegna P.7
FLY Models: 1/72 Caproni Ca.100 & 1/72 Caproni Ca.164
Italiankits.it Visit their website to see quite a number of possible future releases
Italeri re-release a select few of their kits from the back catalog on a limited-run basis. Their 1/48th FIAT Cr.42 and 1/72 FIAT Br.20 kits are due soon.
Recent releases worth checking out are:
AMP 1/48 Piaggio Pegna P.7. Please note that it actually scales out at 1/50.
Dora Wings 1/72 Savoia S.55 series. Highly detailed, but rather complex kits of this iconic twin-hulled seaplane
ICM 1/32 FIAT Cr.42. The first in a series of three boxing of their impressive and highly detailed injection moulded kit.
SBS Model 1/72 FIAT G.50, Macchi MC.72 and Piaggio Pegna P.7. Beautifully cast and highly detailed resin kits.
Sword 1/72: FIAT G.55 , Reggiane RE.2000, RE.2001, RE.2002, RE.2005. 1/48: RE.2001, RE.2005. All worth a look.
Regia Aeronautica kits from the following are a pretty safe bet when comes to overall accuracy and/or subject matter.
Marsh Models 'Aerotech' (Schneider series)
These companies have long since ceased trading and their products are very much missed!
I found these kits had too many issues to make them a worthwhile purchase.
Airfix Savoia S.79 Sparviero (a few shape errors)
Aviation USK FIAT RS-14 (major shape errors)
Delta2 Savoia S55X (very crude moulding)
Delta2 Campini-Caproni (major shape errors)
Dujin Stipa-Caproni (shape errors)
Fly Models Caproni Ca.101 (crude moulding)
Hasegawa FIAT G.50 (poor details)
Italian Wings Piaggio P.119 (shape errors)
Italeri Reggiane RE.2002 (shape errors)
LF Models IMAM Ro.1 (crude moulding)
LF Models Caproni Ca.101 (crude moulding)
LF Models Caproni Ca.331 (shape errors)
Supermodels CANT Z.1007bis (major shape errors)