You had all of the '90s, guys. This isn't some long-lost parent you reconnected with in the twilight years of their life; these are properties that have happily been in the public consciousness for decades, enjoying continuous merchandising and no end to the books and comics and video games that have continued the story you could've been telling on film this whole time. I don't pretend to know how long these filmmakers have been trying to make sequels to these films, but I have to imagine at least one of these planning sessions went something like, "Jeez, Harrison Ford's getting up there, isn't he? Guess we'd better start making sequels again before he's too old to lift a whip or a blaster. You know, I'd completely forgotten he was still acting until I saw a few minutes of Air Force One on TV last night. That was only from a couple years ago, right? He looks great!"
There might be hope for Star Wars: Episode VII, which is being brought to us by the very same director who brought us the last two Star Wars movies (Star Trek and Star Trek Into Darkness). Otherwise, I'm skeptical. Unless the people involved—new and old—profoundly understand both what makes the originals good and how to effectively pick up with a story some 10, 20, even 30 years later, I think I'd rather save my money and catch Joe Dirt 2 whenever it arrives on Netflix.