I thought that the original 6 or 9 movie plan was really meant to be the story of Darth Vader. So if this reboot deals with Kylo Ren in the Darth Vader role, then I'd have thought that means they're not going to go back and do a PT/origins trilogy film for him, otherwise they'd have just started at the Episode 1 beginning. Whilst Vader had some bad ass mystique when we all fell in love with SW, I don't think Ren can hold a story like that. So maybe this chunk of the Disney SW world is 3+ films but nothing like as long as GLs original plan.
For the Marvel stuff you can see the number of films the actors signed up for, and they've already detailed the different phases so you know what's coming. After all, if Daisy decides 3 films is enough, there's not a great deal anyone can do about it and she's already hot property (Lara Croft wtf?! :shock: ). I'm not worried about the stand alone films like Rogue 1, I think it'll be good, but the origins films have me a bit worried. I'm not sure I want to see a Boba Fett origins film, I didn't find him very interesting the first time round, maybe that's just me. Sacrilege for some I know, but I'm not even sure how excited I'd be about a Han Solo origins film.
The difference between Marvel and SW is that the history/villains/story arcs are all set for Marvel in the comics, whereas for SW there's virtually nothing. It'll be interesting to see how they bridge that gap with original content, without spending too much time reprising old characters.