Most (or maybe all?) of the track is in place. I couldn't get the best view or pictures as the Skyride was closed. They got a lot done in the 19 days since I was last there. It also looks like Pass Member previews will be next month according to the rewards page on the website.
I would not be surprised if SF does not "brand" rides at SFDL because they only operate the park, not own it. If the were to officially purchase it from EPR, then they would have more skin in the game and I bet you would see characters everywhere
One character I'll probably never meet at Six Flags parks is Road Runner. I've met Coyote, though.
And I also bought a Road Runner plush in one of the shops.
I would get out of CA as soon as possible. A lot of people are, but they're taking the same mindsets and habits with them that wrecked the state. It's mighty suspicious.
Regardless, MM seemed like a place with great attractions, but was generally a shithole in 2012 when we went. From the outside looking in, it seems to have grown equally in both areas. There's a slim to none chance of us ever returning.