One which came to mind is the grabber machines round by Ghost Train, which has loads of 'Easter Eggs', including the forward reference to Exodus:
All listed here: https://justanotherthemeparkblog.wordpress.com/2021/07/02/every-easter-egg-on-thorpes-graffiti-machines/ (courtesy of yours truly )
A fun one from the link @Inferno posted: Stealth's sign being 'wrong'. Yep, in 2006 it was advertised as going from 0-80mph in 2.3 seconds, and then in 2007 it was "upgraded" to go 0-80mph in 1.9 seconds. I don't think anything happened, so was just either marketing spiel, or a change in the way they measure it.
As another plug, every year on social media, TPM do an advent calendar, which usually mentions loads of these fun Easter eggs too!
Now I'll rattle off some I can remember which haven't been mentioned...
Swarm
-The helicopter had its last flight approx 2 weeks before arriving at the park
-On the toilet block, there's Roman numerals written above the entrance: LCXII. As Roman numerals, that's nonsense, but it's actually saying LC12, which was the codename
Black Mirror
-In the section after the bright tunnel (with the screens where your avatar is being drained), there are codes above each screen, such as JB1, KH2, etc. These are initials of people who were involved in the project.
-The screen before the mirror maze has letters "BML X:\NWO" written on it; a nod to X:\No Way Out
Walking Dead: The Ride
-There's a 'workforce board' in the pre-show room (on the left as you go in). This has names of everyone involved in the project, in one way or another
-There's lots of replica props dotted between the pre show room and load room.
Trailers
The whole maze is an Easter egg to old stuff
Derren Brown
-When you exit the train the first time (onto the tube platform), the information boards are set to the time 06:05:16. That was the original advertised open date for the ride.
-On the exterior of the building, the year 1871 is written. This is 100 years before Derren Brown's birthday, to reference the supposed Victorian-era theme..
-Also in the tube platforms, along with the fracking posters, is a poster resembling Derren Brown's trick or treat cards from one of his old TV shows
-I believe that the old second VR scene (where you were stopped on a bridge above a street) was designed to mimic a road in Action, though I'm not certain of this.
-The station building is modelled off a Victorian-era built, train depot near Willesden Junction
-The floating carriage is modelled off a real carriage:
Consulting my notes, it's a North Eastern railway clerestory bogie composite coach no.3071, first built in 1903.
To be continued...