OK the production cost debate got me curious. If this is too much of a thread jack let me know and I'll stop.
$200 million sounds WAY too low for TFA. Mojo has $245 mil. The Numbers has $306 mil and the NY Times had $250 mil + $30 for studio overhead. It seems clear that the differences relate to accounting for overhead, corporate support and likely the back end bonuses on gross box office.
Other things being equal, Disney will pay out less in back end participation for TLJ because the total box office will be so much lower. OTOH it looks like salary totals will be higher than for TFA. Harrison Ford was supposedly paid $10-20 million for TFA. The $35 million some are throwing around I'm sure includes back end bonuses. Let's use $15 million as the midpoint. Luke and Leia reportedly earned "low 7 figures" each. Say $5 million total. Adam Driver and Oscar Isaac "mid six figures" each. $1 million between them. Daisy Ridley and John Boyega $100-300k a piece. $0.4 million for the pair. There are many sources with similar data but this is a pretty comprehensive one.
https://www.cheatsheet.com/entertainment/star-wars-episode-viii-cast-how-much-make.html/?a=viewall
That gives us $21.4 million upfront salary for the top stars of TFA. Now Ford is gone but bigger roles and renewed visibility for Fischer and Hamill put their TLJ salaries in the "high 7 figure to low 8 figure range" - $10 mil each and $20 million together. Ridley and Boyega will have deals in the "multi million dollar range." Say $4 million each. Driver and Isaac will earn in the "7 figure range" so call it $1.5 million.
That gets us to $31 million for the stars of TLJ vs $21.4 million for TFA using middle of the range based on industry reports. Even if I take the low end on every single one, I can't make the salaries come out lower than TFA.