I'm just going to throw this out here, because too many seem shell shocked from this, but as the dust starts to settle, I think it's evident the Star Wars line is hitting oversaturation. I've said it before, and it can be tiring sounding like a broken record, but just with this years sets, there is not a lot of interesting investment potential in any of them. Maybe the microfighters series 3 as a complete set will net you 2x in 2 years, but that's really the only ones I see, and only the completists that missed out on the first few waves will want them.
Let's look down the list from this year.
The two exclusives - Assault on Hoth and Death Star. We all know what people think of them. If Assault on Hoth retired within a year, those that stock it will win - and probably win big. If it goes more than 2 years, or stays out for 3 or 5 years, then forget it. Death Star - well, we already have heard enough.
Let's look at the winter wave. You have Leia's Resistance Transport, Battle of Takodana, Bespin's Carbonite Freezing Chamber, Droid Escape, Hoth Attack, Kanans Speeder Bike, and the Homing Spider Droid. You also have 4 battle packs.
Personally, out of all these sets, only the Resistance Transport, and the Bespin Carbonite Freezing Chamber jump out at me as potentially 2x sets within a year. Kanans Speeder Bike could be a good risk, because I rarely if ever see that set anywhere. It seems rather rare.
I also like the Battle Packs, because some collectors love to army build. They always will net you 2x if bought at a discount, but that's low hanging fruit, and it takes a lot to make decent money at them. So, out of all those sets, Resistence Transport is probably my favorite when you way costs, time, and potential reward. Followed by Kanan's Speeder Bike (although the set is rather useless and it's all about the minifigs). Carbonite Freezing Chamber could be worth something, although the set isn't a home run in design, and Boba Fett is no longer a sure bet, and he's showing up in just about a new set a year. He's in next year's Desert Skiff, which was last released in 2012.
Battle of Takodana could be an ok bet, but Kylo will surely be made in many sets, and Finn is probably not a big enough selling point. I like the look of the set, but it's not that special. Maz would obviously be the only reason to hoard this one, and that's only if she doesn't appear in any more movies, and they don't make her again, which is very doubtful. At best you have a 2 to 3 year window on this one if it retires this year.
Out of the Summer wave sets, I personally don't like any of them as an investment. The only possible set would be Dengar's Eclipse Fighter, and at best the Jakkuu set because at least it's somewhat unique. But the freemaker adventures is a crappy show, and I don't see that following in even the Rebels footprint. I think those sets will just be duds, although the Dengar minifigure is kind of special. But, that's what is happening now. Lego is now just selling and serving up mostly crap just to sell us minifigures. So many sets now just seem to be poor designs, but they have this exclusive minfigure we haven't had in a while. At that point is it worth buying a set for 40 to 80.00 to get one figure? Probably not. As an investment, i'd say that becomes risky.
Now we have the Rogue One sets. Out of all those sets, and granted, I haven't seen the movie - the only set that jumps out at me as an investment would be the U-wing because out of the gates it has a great lineup of key mini's and a decent new vehicle design. That's it. The AT-TE will be done again, although the Baze figure is a selling point too. The tank, while interesting is not "iconic", nor are the tank troopers, and i'm not sold on Magic Stick Man just yet. Krennic's Shuttle has potential, I suppose, but only if it's short released and this movie is memorable and considered one of the best star wars films made. It reminds me of a cross between the Tydirium Shuttle and Kylo Renns ship. I also think the Tie Striker is just another Tie Fighter variant. Those are getting old, and there's nothing in that set that screams "winner" over a 2 to 3 year period judging from previous versions of Tie's and their sell through rate.
The Rogue One is a critically panned dud, or on par with something out of the prequel era, then I don't like these as investments as much.
So, with that said, that's my take. We have hit the critical saturation point in the Star Wars theme. We knew this would happen, and it was predicted by many here as Disney came into power, and started cranking these out on a yearly basis. By the time Episode 9 rolls around, it might be time for Disney to take a 10 year break from Star Wars, but I doubt they will. Hence, we will see depreciating results with each additional year these films go on.