Hm, that's a hard question. I feel like running something like Star Wars would be a lot, and as much as I love Jurassic Park, the ideas are scarce for that.
I think I would take A Nightmare on Elm Street. First thing I'd do is boot the remake out and start over. As long as he could work, I'd bring Robert Englund back as Freddy. I'd want a trilogy, the first being a remake of the original, but changing things up, bringing new kills and maybe putting a more serious spin on kills from the latter films in the original series. I wouldn't try to clone Nancy (not that the remake Nancy had any personality like the original did.), but feature a lead actress with some different character traits, and different set of friends. .Possibly try the more outcast-type character, so no one really believes the things she says until other start dying and comparing stories and such.I think I'd have both of her parents be cops this time around, as they met through their profession and when the main character was little, were on the Kruger case, eventually joining the parents in burning Freddy. Freddy would get his child-killer origin back. None of the daycare stuff. The molestation can be implied, but I find it stupid that the parents burned Kruger for molesting their kids (I am a father, I would never want anything to happen to my kids, but the fact alone that all the parents banded together to burn him over it seems a little crazy to me, especially as no murder was involved.), and if Freddy isn't a killer already but comes back one.
The second film would be set three years later, and be a new version of Dream Warriors. New kids, new talents (for example the D & D kid would become a Skyrim player), and keep that serious tone with a little humor of the first. Undecided on if the lead girl would return, or if it'd feature a different returning character. Freddy would be lose a lot of his power near the end by them no longer fearing them, however using the possession powers originally exhibited in Elm street 2 and Freddy vs. Jason, he'd free himself from Elm Street, and use his remaining powers to begin spreading himself across all of Springwood.
The third would be a mix of new ideas and ones from the remaining films, but would likely be Freddy's Dead. Of course huge tone change from the original, but I'd be using the remaining Dream Warriors hunting for a way to stop Freddy, while meanwhile he's become extremely powerful while eliminating the rest of the Springwood children. No child of Freddy nonsense, nothing to do with only blood can kill blood. certainly no 3D weirdness. I do like the Dream Demon concept, but instead of coming to him like the original FD showed, I'd have Freddy spend about ten years in Hell, burning, and wandering the vast plains until finding a place where the Dream Demons were banished. They need blood, and fear to make them strong again, so they agree to give Freddy his revenge in exchange for feeding off the carnage he causes. Eventually it would come to finding some artifact that helped seal away the demons in ancient times, and once Freddy is pulled into reality, can remove the Dream Demons from him and he can be killed once and for all.
After that, if Robert Englund was still able, I'd do the prequel, The Elm Street Murders, leading to what makes Freddy into what he becomes. I'm not a fan of movies that kill kids because it is edgy, so I'd say any younger kids would bite it off screen, but we'd still likely have a few teenage characters who Freddy would chase down, leading to the his arrest and release due to a technicality, and then the parents ending him. If there's any one thing that both the Freddy's Nightmares TV series and Freddy vs. Jason got right, its the way Robert Englund played human Freddy. I probably wouldn't keep the ice cream truck or anything like that from the show, but that part in the beginning of Fvs.J with human Freddy is so creepy and well done.
Edit: Added details.
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. They are joined in short order by a TALKING Bumblebee (CB handle "Goldbug"), and get ripped by Lazarus about what's taken them so bloody long to group up AND the fact that the Sweeps have obviously picked up their trail now that they've found a base camp, but Prowl quickly assures Lazarus that he had the Sweeps' transmissions jammed, thus blocking their distress signals back to Seattle; Lazarus' forces thus start moving out the civilians as the Autobots start destroying the camp completely to remove any clues as to where they're going.
