I'd love the Gunboat just as much as the next guy, but I can't be the only one thinking it isn't going to happen. They had the perfect opportunity to introduce the Missile Boat opposite the K-Wing in wave 7. Instead they opted for another TIE design that nobody had even heard of, let alone wanted. The only reason to choose the Punisher over the Missile Boat is if you are unwilling or unable to give the Empire a non-TIE small ship. This leaves me little hope of getting the wonderful Gunboat in a future wave, as it is not a TIE.
No wave 7 was not the place for the missile boat. They typically try not to do too much new in a single wave as it gets hard to test. You can see where this became an issue in wave 8 a little bit with the scout though luckily not really insanely OP, just a little less than ideal.
The K-wing and Punisher allowed for reinforcement of things like bombs and extra munitions. Slam is designed and tested so it can be used in the future without being unfamiliar. I think the general idea is in order for a ship to make the cut it has to add something to the game that isn't there yet and the better the add the further up the line the ship goes. The Gunboat is not a critical add so it will be slow to be added, but I fully expect it will eventually, it is a very pretty and unique ship for the empire with a niche that nothing else for the empire fills.
The Missile boat is also a super unique ship that should likely add some crazy offensive capabilities for alpha strikes, so it needs longer in testing which means I would expect it after the gunboat.
All in all I expect both these ships and the Avenger will make it in by say wave 12. There just are not that many cooler ships to work through before them even with the movies coming out.





