Q3)After seeing the Double Fine Kickstarter I can't help thinking how awesome it would be if Telltale did some original IP, has this already happened and I haven't noticed? Do you think they ever real do a original IP?
-No, I don't think it's likely. Double Fine only just made their first non-original game last year with Once Upon a Monster; that's what they're known for. At the Inventory is the closest example of an original IP, and even still it relies on other IPs in it's nature.
Q4)I'm noticing a lot of people saying that Telltale have changed, lost focus or lost the magic. Is this all because of Jurassic Park, what happened since bttf?
-This is in response to a number of things too numerous to list. One thing I've seen a lot of hate for is Dave Grossman's piece
about games for his mother-in-law. I'd say the "let's be negative against Telltale!" thing started with the Nutri-specs, not with BTTF.
Q5)Are Telltale just doing just King's Quest or do they have the rights to make other games like Space Quest and Police Quest?
We have no idea unless Telltale want to share the express details and fine print of their licensure agreement, which is unlikely.