I would love a lot of subtle references to the other films, as long as it doesn't "interfere" too much with what's happening. I would love it if either Grant/Sattler/Malcolm is mentioned or referenced, same with Hammond. As long as it's subtle or just mentioned once, it gives us some sort of closure. There can be a 5 second cameo of Jeff Goldblum being interviewed on a small TV-screen, saying that he will never return to the island, no matter how "secure" it looks, or a mention of what Grant is up to. I don't want or need any cheesy shoe-horned appearances.