I would erase any memory of Alien 3 and 4, replacing them with one true third and final sequel.
While I'm at it I would be sure to have the Matrix series end on a revised version of Matrix 3. Just my opnion of course.
*going off topic for a second*
Hm... a movie or game that doesn't have a sequel? It sounds stupid, but I think that they need to make a dinosaur game sequel or modern spin-off that doesn't suck. lol
Turok was just horrible, they could have made something similar that actually worked well with adventure..perhaps a Jurrasic Park type thing? Eh, just a thought
*Back on topic*
As far as anime shows go... I'd want a sequel to Gundam 8th MS team or Wing (just for the heck of it).