These are my personal thoughts and opinions on where Gerstlauer are at as a company within the industry.
They've established a popular and relatively cheap coaster style the "Eurofighter", tight compact layouts with record breaking elements that offer even the smallest of parks a chance to own a record breaking coaster with style.
Since developing the Eurofighter idea they haven't really forced themselves to follow the trend of other companies and try and compete in other styles like wooden, inverted etc.... Sure they've developed some family orientated coasters but it's clear the main aim is to develop the Eurofighter as a world class coaster. Even the development of a launched coaster is essentially a branch of the Eurofighter.
What we've seen since the launch of the Eurofighter is a steady development, moving from the clone layouts towards larger or tighter custom layouts.
We've also seen Gerstlauer improve many aspects of the track including strengthening from two tube to three tube with Takabisha among many improvements over the original track. They've improved the car from the default design to allow custom themed carts along with improvements to the user experience e.g. shoulder restraints to lap bars.
We've seen Gerstlauer take the branched launch coaster and integrate it with the Eurofighter (Takabisha). We've also seen Gerstlauer attempt a unique and extremely tight layout (Iron Shark).
What I see in SW7 is everything Gerstlauer has learnt. It features the large layout of Takabisha with many tight elements featured in Iron Shark. Most importantly we see Gerstlauer leaving behind the element that made the Eurofighter so iconic, the vertical drop. This to me suggests this coaster needs no gimmicks, the designers must be very confident that the coaster will meet and exceed peoples expectations.
The first lift hill is significantly longer than the vertical mid course one. This suggests the possibility of a launch up the first hill to match the speed of the mid course vertical lift. It's not a required feature though, however consider Gerstlauer have already experimented with a launched Eurofighter it's a possibility surplus to requirement. Also remember there is no need for a launch anywhere else on the circuit the only possibility would be for a launch towards the first lift hill.
So what could Gerstlauer bring to the table that would be an improvement over previous models. Well firstly lets get the obvious out of the way, we'll certainly see the much improved lap bars and themed cars from Iron Shark. Takabisha saw a modification to the vertical lift and the plans for SW7 would indicate that further changes have taken place.
Gerstlauer have already experimented with an alternative style of car with 6 seats in a stadium configuration, which so far has been confined to it's launched model. This particular model provides low throughput in comparison with the 8 seater Eurofighter. I think we can rule out this style out completely, the track length indicates a similar length to that of Takabisha which has an extremely poor throughput of 650 Pph (taken from the Eurofighter Brochure). Takabisha uses the 8 seater car and still achieves this poor throughput, this doesn't bode well for SW7. This to me indicates that SW7 will have an improved dispatch and many block sections to keep the flow of cars. Unfortunately I still can't see how SW7 will achieve a decent capacity, therefore I believe we'll see some sort of modification to the car which will increase capacity. I believe this would most likely be a 3rd row which would increase the capacity massively. Adding extra seats to the side of the current cars would be near impossible to archive due to the current clearances shown on the plans.
The increased track strength that Gerstlauer have introduced would indicate some sort of plan to allow for increased weight and therefore increased pressures and forces on sections of the track. The type of changes that larger capacity cars would create.
A larger capacity Eurofighter would allow Gerstlauer to market this new and improved Eurofighter to bigger parks that have stricter capacity requirements. However if we don't see an improved capacity, SW7 will need some impressive dispatching to improve the capacity over Takabisha.
So what else could Gerstlauer be doing? Well if they are now happy with the capacity, the cars and ability of the Eurofighter to provide unique and long layouts. They could be working on improving the dark sections of their rides or a unique element (possibly concealed in the station building). What the element could be is a complete mystery.
In regards to the car if capacity is out of the window the only way forward would be to attempt a floorless Eurofighter but I'm not sure that Gerstlauer would have been hyping up lapbars had they had a floorless model in the works.
Anyway, too many thoughts on this one *Edit*
I forgot to add, I see a lot of people complain that SAW is quite rough. Some of the people having only ridden SAW assume Eurofighters were in general are quite rough with newer layouts improving the smoothness. Personally having ridden one of Gerstlauers early Eurofighters (Speed at Oakwood; it's second Eurofighter), I can happily say that Speed is significantly smoother than SAW.
Why? I have no idea...