How ya doin', Molly, and welcome to planDisney!
Early Theme Park Entry is one perk of staying at a Disney Resorts Collection hotel that I nearly never let pass me by. Your Hollywood Studios strategy sounds fantastic. Hitting
Rock 'n' Roller Coaster Starring The Muppets and
The Twilight Zone Tower of Terror before crowds get too thick is brilliant.
In my personal experience, if you're going through the regular standby queue of an attraction, you still get the pre-show fun just as you would at any other time of day. Of course, that is subject to change, and I recommend keeping a listening ear out for any revisions in operations. With your trip not scheduled until 2028, anything is possible.
Pro-tip: If the pre-show is an important part of the experience for you. Feel free to ask the Cast Members at the attractions about it on the actual day. Since operations can change, they'll be the most informed in real time about whether or not you should switch gears and opt to come back later.
Molly, have a wonderful day and keep dreaming those Disney dreams about 2028. If you have any other questions,
come back here. My friends and I have you covered.
Happy planning!
Taylor