None of these games NEED a sequel, these are all just wants. This thread is as bad as all the people who say "Oh X series needs a season 2", they don't need one you just want one. Whenever developers finally get pressured enough to make sequels, they never turn out as people want, they can never live up to the hype. (There may be exceptions to the rule, but that doesn't discredit the said rule)
You shouldn't ask a developer to make a sequel, if they want to make one and they have the funding, they will. A game is rarely good if the developer isn't invested.