This is from an interview with George Lucas on the subject of "Indian Jones".
Really, with the last one, Steven wasn’t that enthusiastic. I was trying to persuade him. But now Steve is more amenable to doing another one. Yet we still have the issues about the direction we’d like to take. I’m in the future; Steven’s in the past. He’s trying to drag it back to the way they were, I’m trying to push it to a whole different place. So, still we have a sort of tension. This recent one came out of that.
Hmm, no comment. Everything is starting to make sense.