Now that we are aware of what models are coming, lets take a look at the new anti-air of the Space Marines. There is a new box set that you can build either variant, the Space Marine Stalker or the Space Marine Hunter
Officially until there is an announcement, we still have to classify these as rumors.
via anonymous sources on Faeit 212
The Space Marine Stalker
Comes with a Icarus Stormcannon Array. Both of these turrets can move independently, and can shoot at two targets at once. Both turrets are three barreled guns.
Space Marine Hunter
Fires a Skyspear Missile from a large single barrel.
Both tanks have several side stabilizers and appear to more heavily armoured along the front and sides. (no stats)