Define thrill ride.
I don't think there will be anything with a height restriction higher than perhaps 42" in Star Wars Land. I also think that any rides will have very high capacity. And, to a point made earlier, if you have straps, seat belts, or bars it takes longer to load. As a result of all these, you aren't going to get an Expedition Everest or RnRC.
We shall see, but I can't imagine a roller coaster (ok, I can imagine it pretty easily, but I can't imagine them putting one in). Its going to be more omnimover, high capacity simulator, or water ride. The economics and Disney history seem to all line up to this.
Some numbers (since I like numbers):
Omnimover - 27000-40000/day (Ariel and Haunted Mansion)
Water ride - 40000/day (Small world and Pirates)
Simulator - 17000-21000 (Soarin and Star Tours) - easily expandable (more screens)
Roller Coaster - 21000-25000 (Space Mountain and RnRC)
So, using a very high level thought process here, at least at Disneyworld we already have a simulator (21000). Add in a more motion based simulator (Soarin meets Harry Potter) likely mid 20s in capacity, we're going to need a volume ride and a ride for the whole family. Its just logical. The 3rd ride (or 2nd ride in DL) is going to be a high capacity omnimover/water ride with no risk of "thrill" or motion sickness. I'd be surprised if not.
I'm going to use a similiar "high level thought process," and look at what we know about the two ride genres you've decided the attractions will be.
Omnimovers:
1) They're slow
2) They don't really put you in the story like other ride systems. They're much more passive.
3) They don't allow for a great amount of interactivity except for rotating around a point (BLSRS 2.0)
4) They're hardly ever a surprise because you can look ahead towards the long chain of cars ahead and know exactly where you're going.
Simulators may work, but present their own set of challenges I'll get to in a moment...
What we know about the SW Land Attractions:
1) The first "[Guests will have] the ability
to take the controls of one of the most recognizable ships in the galaxy, the Millennium Falcon, on a
customized secret mission."
2) The other will be a "epic
Star Wars adventure that puts
you in the middle of a climactic battle between the First Order and the Resistance"
3) They will be highly immersive and not passive attractions.
Problems with a Star Wars Omnimover:
1) Star Wars is fast. Nothing says "climatic battle" like moving slowly past show scenes.
2) These attractions are about immersion. Compare Dinosaur, the log flume on Splash, or Kilimnjaro to SpaceShip Earth (a ride I love dearly). SpaceShip Earth is passive. Instead of being part of the story, you're watching it unfold. In this SW Land, simply watching things unfold is not going to be acceptable. You're going to be part of them. You're going to be going on a secret mission. You're going to be being shot at. Anything less would destroy the immersion.
3) Taking controls of the MF doesn't involve spinning around and around. Admittedly this isn't as big an issue for the other attraction.
4) Yes, go on a customized secret mission while looking at the chain of cars ahead. Or going on that "climactic battle" ride with a whole bunch other guests in cars directly visible to you showing you the way out of the bad situation. Impossible.
I'm not dissing Omnimovers. I love them. But sometimes they're not the right option to choose. They have their place, but not in this SW Land.
As for simulators in SWLand... They may work for one, but not the other. Problems with simulators in SWLand:
1) The simulators used so far at WDW would be a poor choice to put guests into the middle of a "climatic battle" on the ground. That's what the concept art shows. Storm troopers running towards you. This first attraction cannot be a simulator as currently designed. Soarin and ST would be poor choices to create this level of immersion.
2) There's already other high profile attractions with this ride system. That hasn't stopped them before, but it is something to consider.
I'm highly confident that the resistance battle will not be a Simulater, but MF may be. That's reasonable.