Wouldn't it be better to try again with a new Ep7 - same cast new story? You'd sell more tickets that way.

Rating: 4/10 (26 December 2015)

Characters & Cast: 8/10.
Art & CGI: 9/10.
Directing: 8/10.
Script: 5/10.
Story: 1/10.
But it's the last one that matters the most.
I'm positive that if you decided to shelve this one and try again, fans would almost universally thank you and wouldn't at all mind paying to see a better Ep7 a year later.
But first you'd need to find decent script writers that have demonstrable imagination.
The alternative is to make two more sequels based on a bad foundation. They will suffer, and so will viewer numbers.